八年级下学期英语人教版习题第四单元Unit4_语法专练

Unit4 语法专练

一、单项选择

1. —Bob, it’s getting cold outside. _________ take a jacket with you?

—All right, Mom.

A. Why do you

B. Why not

C. Why did you

D. Why don’t

2. —______ the workers are very tired, _______ they keep on working. —They are great. We must learn from them.

A. Because; /

B. Though; /

C. Because; so

D. Though; but

3. You’d better take the map with you ______ you won’t get lost.

A. so

B. as soon as

C. so that

D. as long as

4. —Hurry up. The bus is coming.

—Oh, no. We mustn’t cross the street ______ the traffic lights are green.

A. after

B. since

C. when

D. until

5. Frank lives a simple life _______ he has lots of money.

A. although

B. because

C. so

D. if

参考答案及解析

1. B “Why not +动词原形?”表示提建议，是常用口语。

2. B 句意为“尽管工人们很劳累，但是他们继续工作”，though“尽管，虽然”，且though与but不能同时使用。

3. C 由上句句意“你最好带上地图”可知下句句意为“为了你不会迷路”，故用so that引导目的状语从句，表示“以便，为了……”。

4. D 句意为“直到交通灯变绿，我们才能穿过马路”，after“在……之后”；since “自从”；when“当……的时候”；not ... until …表示“直到……才……”。

5. A although “尽管”，引导让步状语从句；because“因为”，引导原因状语从句；so“因此”，连接一个表示结果的分句；i f “如果”，引导条件状语从句。句意：尽管弗兰克有很多钱，但他过着简朴的生活。故选A。