1.________ into use in April,2000，the hotline was meant for residents reporting water and heating supply breakdowns.

　　A.Put

    B.Putting

　　C.Having put

    D.Being put

　　解析：选A.考查过去分词作状语。句子的主语是the hotline与put into use“投入使用”存在被动关系，排除表示主动的B项和C项。D项表示正在投入使用，不符合语境。

　　2.(2010年高考湖南卷)Dina,________ for months to find a job as a waitress,finally took a position at a local advertising agency.

A.struggling

B.struggled

C.having struggled

D.to struggle

　　解析：选C.此处分词短语作时间状语，其逻辑主语Dina与struggle为主动关系，故排除B项。由句中的finally可知非谓语动词表示的动作发生在句中谓语took a position之前，故用现在分词的完成主动式。

　　3.(2009年高考江西卷)________ the right kind of training,these teenage soccer players may one day grow into international stars.

A.Giving

B.Having given

C.To give

D.Given

　　解析：选D.考查非谓语动词。如果把句子补充完整应该是：If they are given the right kind of training,可知主语they即these teenage soccer players与give之间是被动关系，所以用过去分词。而A、B、C三项都不表示被动含义。

　　4.(2009年高考四川卷)________ many times,he finally understood it.

A.Told

B.Telling

C.Having told

D.Having been told

　　解析：选D.考查非谓语动词。tell与主语之间的关系是被动关系，故排除表示主动意义的B项和C项。由状语many times可知tell这一动作在谓语动词understand之前发生过多次，所以用having been done来表示被动和完成。

　　5.(2009年高考天津卷)________ by the advances in technology,many farmers have set up wind farms on their land.

A.Being encouraged

B.Encouraging

C.Encouraged

D.Having encouraged

　　解析：选C.考查非谓语动词。由于主语many farmers和作状语的encourage之间是被动关系，排除表示主动意义的B项和D项。而being encouraged除表示被动外，还表示进行。农民们显然不是正在受到科技进步的鼓舞，故排除A项。

　　6.(2011年汕头高二检测)________ in 1636，Harvard is one of the most famous universities in the United States.

A.Being founded

B.It was founded

C.Founded

D.Founding

　　解析：选C.分析句子结构可知应选考查非谓语动词形式作状语的，排除B项，另外found与Harvard之间为被动关系，应用过去分词形式作状语，故选C.

　　7.(2011年晋中高二检测)________ as the "First Lady of Speech"，Dr Lillian Glass is recognized as one of the world’s leading experts on communication skills.

A.Knowing

B.Having known

C.Known

D.To be known

　　解析：选C. be known as被称为……。Dr Lillian Glass与know之间为被动关系，应用过去分词形式作状语。A、B表主动，应排除;D项表将来，也可排除。

　　8.________ more attention,the trees could have grown better.

A.Given

B.To give

C.Giving

D.Having given

　　解析：选A.考查分词作状语。句子主语the trees与give之间是被动关系，而四个选项中只有A项表示被动意义，故答案选A.Given more attention相当于一个条件状语从句If the trees were given more attention.

　　9.________ in thought,he almost ran into the car in front of him.

A.Losing

B.Having lost

C.Lost

D.To lose

　　解析：选C.考查分词作状语。句意：由于陷入沉思，他差一点撞到前面的车上。be lost in thought为固定搭配，意为“陷入沉思”。过去分词短语lost in thought在句中作原因状语。

　　10.The research is so designed that once ________ nothing can be done to change it.

A.begins

B.having begun

C.beginning

D.begunw

　　解析：选D.考查分词作状语。句意：这项调查研究事先计划的如此完好，以至于一旦开始，什么也无法改变它。begin与research之间是被动关系，排除表示主动意义的A、B、C三项。once begun在句中作条件状语，它是状语从句once it is begun的省略形式。

　　11.Generally speaking,________ according to the directions,the drug has no side effect.

A.when taking

B.when taken

C.when to take

D.when to be taken

　　解析：选B.考查分词作状语。完整的说法应是when the drug is taken according to the directions……。由于主句的主语和从句的主语相同，因此可以省略从句的主语the drug和谓语的一部分is,故答案为B.

12.(2009年高考福建卷)________ not to miss the flight at 15∶20，the manager set out for the airport in a hurry.

　　A.Reminding

    B.Reminded

　　C.To remind

    D.Having reminded

　　解析：选B.句意：有人提醒经理不要错过15∶20的航班，他匆忙出发去了机场。本题考查非谓语动词作状语。主句主语the manager与remind之间的关系为逻辑上的动宾关系，故排除A、C、D三项，因为这三项表主动，而只有B项表被动。

　　13.In order not to be found,I spent the whole night ________ in my room.

A.locking

B.locked

C.to lock

D.lock

　　解析：选B.考查过去分词作状语。句意：为了不被找到，我整晚上都把自己锁在自己的房间里。lock的逻辑主语I和lock之间存在被动关系，故用过去分词作伴随状语。本题易受“spend…… doing sth.句型的影响，易误选A.其实我并不是把整晚上的时间都用在了“锁”这一动作上，故排除A.

　　14.________，liquids can be changed into gases.

A.Heating

B.To be heated

C.Heated

D.Heat

　　解析：选C.考查过去分词作状语。句意：被加热时，液体可以变成气体。由于对于液体来说是加热的承受者，是被动的，因而选C.A项表示主动，B项表示目的，D项是谓语动词的形式。

　　15.Unless ________ to speak,you should remain silent at the conference.

A.invited 

B.inviting

C.being invited 

D.having invited

　　解析：选A.考查过去分词作状语。句意：除非受到邀请讲话，否则在大会上你应该保持沉默。invite与you之间是被动关系，排除B、D.being invited表示正在受到邀请，不符合语境。