25.Having been attacked by terrorists,_____________.

A.doctors came to their rescue　　　　　　　　 B.the tall building collapsed

C.an emergency measure was taken　　　　　　 D.warnings were given to tourists

解析：注意作状语的分词的逻辑主语应该就是句子的主语。句子的主语(the tall building)应该就是受攻击(having been attacked )的对象。

答案：B

24.The bread my wife makes is much better than_____________you can buy at a store.

A.that which　　　　 B.one that　　　　 　　C.that of which 　 　　D.this of which

解析：that指代上文中提到的不可数名词，which引导定语从句。

答案：A

23.-_____________ I didn’t hear you clearly.It’s too noisy here.-I was saying that the party was great.

A.Repeat.　　　　　 B.Once again.　　　　　 C.Sorry.　　　　　 　D.So what?

答案：C

22.I failed in the final examination last term and only then_____________the importance of studies.

A.I realized　　　　 B.I had realized　　　　 C.had I realized　　　　　　　 　 D.did I realize

解析：only位于句首，后接状语时句子部分倒装。

答案：D

21.I do every single bit of housework_____________my husband Bob just does the dishes now and then.

A.since　　　　　　 B.while　　　　　　　 C.when　　　　　　 D.as

解析：while用在此处表示前后两者的情况进行对照，意思是“然而”。

答案：B

20.It will take thirty minutes to get to the station,_____________traffic delay.

sidering of　　sidered of　　　 C.allowing of　　　　　　 D.allowed for

解析：consider为及物动词，排除A、B两项。现在分词短语引导条件状语从句，意为“将……考虑在内”。

答案：C

19.Helen always helps her mother even though going to school _____________most of her day.

A.takes up　　　　 B.makes up　　　　　 C.saves up　　　　　　　　　　 D.puts up

解析：take up的意思是“占去，占据”。

答案：A

18.Sometimes it was a bit boring to work there because there wasn’t always _____________much to do.

A.such　　　　　 B.that　　　　　　 C.more　　　　　　　 D.very

解析：that是副词，相当于so。

答案：B