Answer the questions about mobile security.

1 What mobile devices do users and businesses employ? 2 Why is access to mobile devices important? 3 What does mobile security involve? 4 Why is the term mobile security broad? 5 What does mobile security also refer to? 6 What forms of authentication do you know? 7 What is a threat to mobile devices owners? 8 Is it possible to avoid downloading something harmful? 9 Why should we avoid unknown sources? 10 How can the ratings and downloads of apps or games by other people help? 11 Is it possible to stay safe with a mobile device? Why? Why not? 12 What advice can you give to avoid malware?

Use the information from the text to complete the sentences.

1 M _ _ _ _ _ s _ _ _ _ _ _ _ deals with accidental loss of the mobile device. 2 Mobile devices collect and a _ _ _ _ _ _ much sensitive information. 3 Mobile security is a b _ _ _ _ t _ _ _. 4 Mobile security studies how to r _ _ _ _ _ malware r _ _ _ _. 5 You can avoid i _ _ _ _ _ _ _ _ _ _ _ _ downloading harmful, if you are careful. 6 C _ _ _ _ t _ _ r _ _ __ _ _ and read review from other users on each app. 7 Apply some c _ _ _ _ _ s _ _ _ _ and be cautious when you employ a mobile device. 8 Stay safe with a mobile device and you’ll never e _ _ _ _ _ _ _ _ malware problems.

GRAMMAR

Present Perfect

We form Present Perfectwithhave/has and Participle II of the verb.

Present Perfect Adverbs

9 Open the brackets and put the verbs into the Present Perfect form.

1 I __________ (see) this film twice. Let’s see another film.

2 Pete __________ (lose) his keys. He is not able to come into his flat.

3 John works hard. He__________ (write) three reports on Physics since Monday.

4 Who is that lady? I __________ (never/see) her before.

5 I don’t know Jake. I __________ (never/meet) him.

6 __________ (you/phone) your mother yet? She asked me to remind you.

7 How much of your course work __________ (you/do) yet?

8 I’m looking for Sam. __________ (you/see) him?

9 __________ (you/hear) about the new album of this rock band? – I ______ (hear) it’s very popular.

10 [A]Excuse me. __________ (someone/leave) this bag here? [B]I don’t know. I ______ (not/notice) it until now.

10 Fill in the sentences with the right adverb just, already, or yet.

1 [A]Jake, this is Mary. [B]Yes, I know. We have __________ met.

2 [A]Are Karl and Sam here? [B]No, they haven’t come __________.

3 [A]Where is Richard? [B]I’ve __________ seen him in the corridor.

4 [A]Have you read this book __________? [B]No, I’m still reading it.

5 [A]Do you know when Justin is going away? [B]He has __________ gone.

6 [A]I haven’t read this book __________. [B]You should read it, it’s very interesting.

7 [A]Have you finished your project? [B]No, I haven’t. I haven’t even started it __________.

8 [A]Are Karl and Sam here? [B]Yes, they have __________ come. (= a short time ago)

9 [A]What time is Jake coming? [B]He has __________ come. (= before you expected)

11 Complete each sentence with for or since

1 I have known you ______you were born.

2 Our parents have known each other ______10 years.

3 I have studied English ______ the second grade.

4 We have been good friends ______ many years.

5 I have played tennis ______ ten years. I have won many competitions.

6 We’ve been awake ______6 o’clock this morning.

7 Sam has lived in Tomsk ______ 2013.

12 Rewrite the following sentences into the Present Perfect form.

1 I am learning a new grammar rule.

2 Jane is telling them an interesting story.

3 The students are writing a dictation.

4 I am writing my course work.

5 The teacher is explaining the new material.

6 We are buying the new equipment for our laboratory.

7 Kate is cleaning her room.

8 I am eating my breakfast.

9 Pete is not translating an article from a foreign language.

10 Are you watching the news?

11 Is Susan making a new dress for the graduation ceremony?

13 Complete the sentences using the Present Perfect (negative) + today, this morning, this year, this semester etc. as in the example.

Example: I saw Kate yesterday but I haven’t seen her today.

1 Cary studied hard last semester but __________.

2 It rained a lot last autumn but __________.

3 The company earned much money last year but __________.

4 Our college basketball team won many games last season but __________.

5 I read all the e-mail messages yesterday but __________.

6 We won the competition last year but __________.

7 Sarah watched a film last week but __________.

8 George cooked dinner for his family yesterday morning but __________.

9 We prepared two course projects last term but __________.

14 Correct the following sentences.

1 I've lived here since ten years.

2 I've studied English for 1998.

3 I've known her since a long time.

4 I have yet finished my homework.

5 You have ever been to Spain.

6 Our team hasn’t already developed a new project.

7 I haven't eaten sushi for I lived in Japan.

8 She has been a student since too long.

15 Fill in the gaps with the correct verb from the box in the Present Perfect.

AIt __________ a terrible day today. The alarm clock __________ at 7:15 a.m., so I __________ at 7:50 a.m. I __________ breakfast because I was really late for work. The bus __________ just __________ when I arrived at the bus stop, so I __________ a taxi. It __________ £8:40!!!

B The boss __________ because I was late and he __________ me a lot of work. I __________ more than 20 letters and __________ about 30 e-mails. Besides, the phone __________ every five minutes. I __________ so busy that I __________ lunch today and I __________ hungry the whole day.

C I __________ already __________ home and __________ dinner. It’s 10 p.m. now, I’m going to bed to forget such a terrible day!

16 Ask and answer the questions as in the example. Use the phrases below.

Example: Have you ever ridden a horse? – Yes, I have ridden a horse twice this year. – No, I have never ridden a horse.

Date: 2016-04-22; view: 1022