13.
1. A. are you looking for, B.are looking, have not bought
2. A. are you doing, B.am reading, A.is, have you been reading
3. A. are, B.is working, A.has been working
4. A. are you waiting for, B.am waiting, have been waiting
5. A. have been standing, B. have been talking
6. A. are you thinking, B, am thinkaing
7. A. are singing, B. have been singing, have walked
14.
1. returned, has been waiting
2. has read
3. came, has been making, has been having
4. did you discuss, have never heard
5. were
6. have not changed, have recognized, saw
7. did go
8. have been overeating, have lost, have lost, told
9. saw, was driving
10. has not said, has not got
15.
1. are you hearing, have been talking
2. has changed
3. have not seen
4. am
5. am leaving
6. am going, don't begin cutting, come back
7. see, talk
8. have been living, is
9. have been crying
10. has not arrived, are standing
11. know, know
12. has been listening
13. asks
16.
1. How does your son do? - All is good. I've just phoned him.
2. How long have you been working here? - About three years.
3. Here you are, said he, I've been waiting you for long time.
4. I've been thinking about you said since yersterday.
5. Ted, I'm finding you all around. What have you been doing all this time?
6. Come in, my darling. I've been trying to find you the whole morning.
7. Boys are in the garden. They have been looking at birds about a half of hour.
8. Please, tell me when will the mechanic come? I have been waiting him since 10 o'clock.
9. It has been raining already three days.
10. I have just seen him. He was crossing the street.
11. When did he come?