Ex. 43, p. 461 1. This medicine must be taken regularly. 2. Homework must be done in time. 3.
Peace can be won. War is not inevitable. 4. The book maybe put on the upper shelf.
5. The children maybe allowed to go for a walk. 6. The matter must be discussed not
later than tomorrow. 7. It can't be done without your help. 8. The matter must be
looked into. 9. The magazine mustn't be taken away. 10. The letter must be posted as
soon as it has been written. 11. May the books and papers be taken away? 12. The
dinner must be paid for. 13. Success must be worked for. 14. It can't be desribed. It
must just be seen.
Ex. 44, p. 462 1.I have forgotten my own language and
can speak nothing but yours. 2. We
must go
somewhere. We
can't wander about forever. 3. But I think you
must have told us this
half an hour ago! 4. You
can't see much of interest there. 5. I did not hear him return
to the room. I
must have been asleep. 6. You
must have mistaken him, my dear. He
cannot have intended to say that. 7. It seemed possible they
might return. 8. It
cannot have happened at Ainswick. 9. No good looking back; things happen as they
may. 10.
To be ashamed of his own father is perhaps the bitterest experience a young man
may go through. 11. How
could you let things slide like that, Dick? 12. I think you
may/ might/could be glad of some coffee before you start back to your hotel. It's such a
cold night. 13. It was known — whispered among the old, discussed among the
young — that the family pride
might soon receive a blow. 14. And though he
undressed and got into bed, he
could not sleep.15. You
mustn't go out so late at night.
16. I think it
may/might/could happen sooner or later. 17. I
may come tonight,
may I
not? 18. "Somebody is knocking at the door. It
must/may be John." — "It
can't be
John. It's too early for him to be back." 19. I don't know for certain, but he
may/might/could have been a sailor in his youth. 20. They
may/might/could ask me
about him. What should I say?