新概念英语第二册课后练习答案lesson21

新概念英语第二册课后习题答案详解

Lesson 21

练习答案

Key to written exercises

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