1. She could have done just as well as you, |||| the chance.

A. given B. to give C. giving D. give

A 句子的主语和后面分词的逻辑关系时被动关系，是主语she被给机会，故选A。这是一种没if的含蓄条件句，但分词短语有假如含义。

2. Helen had to shout |||||||| above the sound of the music.

A. making herself hear B. to make herself hear C. making herself heard D. to make herself heard

D。helen大声嚷以便让我们的声音能被听到。

3.||| under a microscope, a fresh snowflake has a delicate six|pointed shape.

A. Seeing B. Seen C. To see D. To be seen

B。本句考查非谓语动词的使用方法。分词短语做状语，由于主语和分词之间的关系是被动关系，因此用过去分词。

4.|||| by the look on her face, she didnt catch what I meant.

A. Judging B. Judged C. Judge D. To judge

B 本题考查固定使用方法：judging by依据判断。

5. Good|bye, Miss Liu. Im very pleased |||.

A. to meet you B. to have met you C. meeting you D. having met you

B 在告别时，应该说Im pleased meeting you.或Im pleased to have met you.非常高兴见到你。其中Im pleased to have met you.更容易见到，两种形式同为备选项时，优先选择完成形式。在见面时则应该说Im please to meet you.非常高兴见到你。另外固定搭配be pleased with sth：对感到认可。

6. Lets buy our tickets while I still have |||.

A. a little money to leave B. little money left

C. a few dollars left D. few dollars to leave

C。B项和D项中的little和few均为否定含义，与句意不符，排除。C项为have sth. left使用方法，意思是：还剩下。这里have a few dollars left的意思是还剩下几个USD，left的过去分词是leave，它的宾语是前面的a few dollars。句意为：大家买票吧，尽管大家这只剩几USD了。while：尽管。

7. We shall ask for samples ||| and then we can make our decision.

A. to be sent B. being sent C. to sent D. to have been sent

A本句考查非谓语动词做宾语补足语，由于是以后式，所以用动词不定式做宾补，又由于宾语和宾语补足语之间是逻辑上的动宾关系，因此用动词不定式的被动。本句的意思是：大家需要把商品的样品送来，然后大家可以做出决定。

8. Some cities have passed laws that allow coal and oil |||| only if their sulfur content is low.

A. burning B. to burn C. being burned D. to be burned

D。本题考查的是allow sth. to be done，主动形式是allow sb to do sth.此处是允许大家在硫含量低的状况下燃烧煤和石油，所以它们是被燃烧，用被动。

9. Mother warned the electric lamp.

A. not to touch B. him not to touch C. him not touching D. him not touch

B不定式的否定式。warn sb not to do sth是固定搭配。意为警告某人不要做某事。

10. Dont leave the water |||||||| while you brush your teeth.

A. run B. running C. being run D. to run

B。不要让水一直流着。

11. Having a trip abroad is certainly good for the old couple, but it remains |||||whether they will enjoy it.

A. to see B. to be seen C. seeing D. seen

B。本题考查固定使用方法。It remains to be seen尚待分晓。对于这对老夫妇来讲去海外旅游是好事情，但还要看到底他们爱不爱。第一it还有待于察看，表以后用不定式。这件事情是被察看，因此选被动。综上选B。

12. The purpose of new technologies is to make life easier, ||||||| it more difficult.

A. not make B. not to make C. not making D. do not make

B。新技术的目的是让生活变得更容易，而不是变得更难。不定式作表语。

13. One can go a long way after one is |||||||||.

A. tire B. tiring C. tired D. to be tired

C。一个人累了之后还能走非常远。

14. The pilot asked all the passengers on board to remain |||||||| as the plane was making a landing.

A. seat B. seating C. seated D. to be seating

C 飞行员需要飞机起飞时，所有些乘客在座位上坐好。

15. He is ||||||| about why other lions are running away, until an old lion tells him that hunters are coming.

A. confused B. confusing C. being confused D. to be confused

A。他感到困惑confused 固定使用方法。

16. It is hot and dry; the flowers need ||||||.

A. being watered B. be watered C. to water D. to be watered

D 这里是固定使用方法，need to be done前面的被修饰词与be done的动词是被动关系。need to be done=need doing。

17. What || next will be discussed at todays meeting.

A. will do B. to do C. shall we do D. to be done

B 本题考察动词不定式做主语，What to do 是固定使用方法，此处不定式to do 表示以后要做的事情;假如选A项则没主语;选择D项则没谓语;假如选C，应改为 What we shall do ,由于在what, which, where 这种特殊疑问句引导下的问句中做主语时，句子要用陈述句语序。

18. My room is a mess. It needs |||.

A. to be tidying up B. tidying up C. to tidy up D. tidied up

B。句型：主语+need+doing，后面用动名词的主动形式来表示被动含义或不定式的被动形式来表示。The house needs cleaning.：这房屋需要打扫了。The radio needs repairing。这台收音机需要维修了。

19. Good medicine ||||| bitter to the mouth.

A. tastes B. tasting C. to taste D. is tasted

A。主动表被动。

20. There are many good films played by Cheng Long that are worth||||||||.

A. to be seen B. being seen C. seeing D. to see

C。这有不少成龙演的好电影。Be worth doing值得做某事。