15. Although he has become wealthy, Mr. Wood remains ________ he used to be, modest and friendly.

A.when B.where

C.how D.what

16.You must notice ________ the emergency exit is when you enter the building.

A.which B.where

C.what D.in which

答案：B　考查宾语从句。句意为：当你进入大楼时，必须要留意紧急出口在哪儿。此处是where引导的宾语从句。故B项正确。

17. Rosa regretted giving her opinion about the decision directly, feeling ________ she should have expressed it differently.

A.how B.why

C.that D.if

18. The mother, who is strict with her two daughters, has a clear list of ________ they are not permitted to do.

A.why B.how

C.what D.which

19. After a day's exhausting climb we arrived at ________ we had been told was Garden in the Air.

A.what B.which

C.that D.where

答案：A　考查名词性从句。句意为：经过一天筋疲力尽的攀爬，我们终于到了那个被称为“空中花园”的地方。分析句子结构可知，at为介词，后面是一个宾语从句，we had been told为插入语，宾语从句中缺主语，故用what。故答案选A。

20.I couldn't imagine ________ difficult it was for these badly injured victims to make it to the hospital.

A.when B.how

C.what D.where

答案：B　考查名词性从句。分析句子结构可知，动词imagine的宾语从句中，中心词是形容词difficult，所以用连接词how引导。

21. His writing is so confusing that it's difficult to make out ________ he is trying to express.

A.what is it B.what is it that

C.what is that D.what it is that

22.—Haven't I seen you some place before?

—Yes. That's ________ I don't go there anymore.

A.because B.how

C.why D.when

23. We have realized ________ she is expecting is just an opportunity to test her ability.

A.that B.which

C.what D.where

24. The Frenchman pointed to the spoon and asked me ________ to call that in Chinese.

A.whether B.where

C.which D.what

答案：D　考查名词性从句。句意为：那个法国人指着一把勺子问我那个用中文怎么说。句式分析：asked me后为宾语从句，从句中缺少宾语补足语成分(作call的宾语补足语)，因此应用what。故答案选D。

25. We believe ________ we can find out the wonder drugs to H7N9 bird flu.

A.when B.whether

C.what D.that

26. Life is ten percent ________ happens to you and ninety percent ________ you respond to it.

A.which; how B.what; what

C.that; that D.what; how

答案：D　考查名词性从句。句意为：生活的百分之十是事件本身，另有百分之九十在于你如何回应它。分析句子结构可知，第一空引导表语从句，happens to you缺少主语，因此应用what来引导，相当于the thing that;第二空也引导表语从句，you respond to it成分齐全，因此应用how作方式状语。故D项正确。

27. The problem is ________ sometimes when we are given something on a constant basis, we start to take them for granted and forget being thankful for what we already have.

A.that B.how

C.where D.which

28.—Sir, I feel it complicated to apply to a university abroad.

—Why not read our guide? This is ________ the relevant information is available.

A.what B.how

C.where D.why

答案：C　考查表语从句。——先生，我感到申请到国外上大学是复杂的。——为什么不看我们的指导呢?相关的信息可以从我们的指导中获得。分析句子结构可知，空格处引导表语从句，且在表语从句中作地点状语，故用where引导。