А. вставьте соответствующую форму инфинитива в следующие предложения: не speaks english well. не must have studied it for a long time. they are laughing. they must be having a good time. 1. nobody answered the phone. they must out. (go) 2. the line is busy. he must the phone, (use) 3. you made a
long distance call. it must expensive. (be) 4. i need more money. i should my job. (change) 5. i got the wrong number. i may incorrectly. (dial) 6. what is he doing? he should the report. (type) 7. mr smith didn't return my call. he might busy. (be) 8. i couldn't make my call. i must to put a coin
at the slot. (forget) 9. there is somebody in the office. it might cooper, (be) 10. you've given me a letter. shall i it? (send) 11. he is out. he must dinner, (have) 12. there were five of them. it must one of them.(be)
1) have gone
2) be using
3) have been
4) change
5) have dialed
6) be typing
7) have been
8) have forgotten
9) be
10) send
11) be having
12) have been