A. could express B. would express

C. could have expessed D. must have expressed

2. The increased number of vehicles on the road choked off traffic, and the roads became so busy that no one could travel anywhere.

该句是____________ ( 简单句/ 复合句 ) , so... that 引导的_________________ 从句。

其中 choke off 的意思为________________ , 写出下列词组的意思：

choke back _____________________ choke up _____________________

小试牛刀！(B级)

通往政府办公大楼的通道被人群堵住了。

_____________________________________________________________________________

3. As more advanced ways of digging tunnels were developed, the first railway tunnel under the River Thames was dug in 1884.

这是一个as 引导的________________ 从句。

拓展：下面都是含有as的状语从句，请把他翻译，并指出是什么类型的状语从句。

1. As he grew older, he lost interest in everything except gardening. ( ___________ 从句　)

_____________________________________________________________________________

2. Young as I am , I already know what career I want to follow. ( ___________ 从句 )

_____________________________________________________________________________

3. Why did not you catch the last bus as I told you. ( __________ 从句 )

_____________________________________________________________________________

4. As you went out , I left a message. ( __________ 从句 )

____________________________________________________________________________

4. Having seen the situation, a wealthy American businessman, Charles Yerkes, tried to improve the system by buying many different lines and setting up the Underground Group.

现在分词短语 "having seen the situation" 作________________ ( 成分 )。表示从句的动作发生在主句的谓语动词___________ 。现在分词作状语表示分词与逻辑主语是__________ 关系，相反地，如果表示分词和逻辑主语时动宾关系的时候，则用_______________ 。

句中的 set up 的意思是____________ ，还有_______________________ 意思。请写出下列词组的意思。

set about _____________________________ set aside ___________________________

set off _________________________________ set out _____________________________

小试牛刀！（B级）

(1) ______________ in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.

A. Waiting B. To wait C. Having waited D. To have waited

(2) When ____________ different cultures, we often pay attention only to the differences without noticing the many similarities.

A. compared B. being compared C. comparing D. having compared

(3) The standards were ___________________ by the governing body.

A. set up B. set down C. set out D. set in

5.The last line added was the Jubilee Line in 1977 in honour of the twenty-fifth anniversary of Queen Elizabeth's crowning.

句中的added 是____________ 作_________ ( 成分 )，修饰名词____________ 。其中的in honur of 的意思是___________________ 。