Complete the dialogues, use Present perfect or Past simple.

Nick:Bob!What are you doing in the kitchen?
Bob: .....................................................
Nick:That sounds nice.How long have you been cooking it?
Bob: ..............................................
Nick:Jane,I need your help.
Jane:Excuse me,I am........ .Ask Sam
Bob:Sam isn't in.I asked him to do shopping.
Nick:Is he going to come soon?How long........................?
Bob:Well,..........................................
Jane:OK.I've done it already and i am going to help you,Nick.

1) my father...(read)magazines very often
2)What time...your mother...(finish)her job in the evening?
3)She ...(go)to the gym twice a week
4)Liza...usually...(drive)to work.He usually catches the bus.

Then and now
Twenty years ago few people realized (realize) that computers were about to become part of our daily lives. This short period of time has seen (see) enormous changes, in business, education and public administration. Jobs which _________________(take) weeks to complete in the past, are now carried out in minutes. Clerks who _______________ (spend) all day copying and checking calculations are now freed from these tedious tasks. In offices, the soft hum and clicking of word processors_________________(replace) the clatter of typewriters. Schoolchildren ____________________ (become) as familiar with hardware and software as their parents _________________ (be) with pencils and exercise books. Computerization of public records __________________ (enable) government departments to analyze the needs of citizens in details. Some of us may wonder, however, whether life ______________ (really/improve) as a result of these changes. Many jobs __________________ (disappear), for example, when intelligent machines ________________ (take) over the work. Employers complain that clerical staff ______________ (become) dependent on calculators and cannot do simple arithmetic.

We (to do) already the washing up. 4) I (to take out) rubbish. 5) What you (to do) yesterday? 6) What you (to do)? 3. Find the right answer to the questions 1. What has happened to Mary? a) Mary was ill. b) Mary has fallen ill. 2. When did you see the film? a) I have seen the film already. b) I saw the film yesterday. 3. What have you come here for? a) I have come to see you. b) I come to see you an hour ago.

(stop)

The town is very different now. It has changed a lot. (change)

a) I did German at school, but I ....................................... most of it now. (forget)

b) The police ....................................... three people, but later they let them go. (arrest)

c) What do you think of my English? Do you think it .......................................? (improve)

d) A: Are you still reading the paper?

B: No, I ....................................... with it. You can have it. (finish)

e) I ....................................... for a job as a tourist guide, but I wasn’t successful. (apply)

f) Where’s my bike? It ....................................... outside the house, but it’s not there now. (be)

g) Look! There’s an ambulance over there. There ....................................... an accident. (be)

Ex.1.Rewrite the sentences using the Present Perfect or Past Indefinite.
Examples:I am writing a letter to my cousin.(already;yesterday)
I have already written a letter to my cousin.
I wrote a letter to my cousin yesterday.
1)the waitress is bringing our tea(a few minutes ago;not yet)
2)the bell is ringing (just;some minutes ago)
3)He is going to London in a few days(already;last week)
4)The boys are playing football in the yard now(yesterday;many times)
5)Mother is reading a new novel by Aitmatov(this month;last year)
6)Students are cleaning their classrooms(already;last Saturday)
7)The teacher is explaining a new rule(just;at the pervious lesson)
8)Ann is doing her home work(just;on Friday)
9)They are discussing this problem again(many times; a few days ago)
10)Granny is making a birthday cake(just;yesterday)
11)The birds are flying to the South.(already;at the end of August)
12)the train is coming(just;an hour ago)
13)Who is your friend speaking to?(yesterday;just)
14)We are writing the words of Lesson 7(already;at the last lesson)