1．关键句型练习答案
A …passing planes can be heard(1.2);
The airport was built (1.2);
it could not be used then(1. 3);
a hundred people must have been driven away(11.4-5);
this house will be knocked down by a passing plane(11.6-7);
I have been offered a large sum of money(1.7)
C
1 A message will be sent immediately.
2 All these goods must be sold.
3 I told you the parcel would be received in time.
4 The letter has to be delivered by hand.
5 Your letter must have been lost In the post.
2．难点练习答案
A (sample answers)The dog drove the sheep out of the field.The police drove the crowds back.I drove my car into the garage.
B1 home 2 houses 3 house 4 home
3．多项选择题答案1c 2d 3c 4d 5a 6c7b 8b 9a 10d 11c 12c