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　　1.________ the universe began with the “big bang” has been widely accepted.

　　A.Whether B.Why

　　C.That D.What

　　答案：C　句意：宇宙開始于“大爆炸”已被廣泛接受。從句中意義完整，只需要引導詞，故選C。

　　2.It has been proved ________ having a balanced diet helps to keep healthy.

　　A.if B.because

　　C.when D.that

　　答案：D　句意：據(jù)證明擁有一個均衡的飲食有助于保持健康。it為形式主語，后面從句為真正的主語，且從句意義完整，故選D。

　　3.________ we'll go camping tomorrow depends on the weather.

　　A.If B.Whether

　　C.That D.Where

　　答案：B　由depends on the weather可知，此處應為“是否”之意，應用if或whether，而主語從句置于句首時只能用whether。故選B。

　　4.(2014·萊陽高一檢測)________ is a fact that English is being accepted as an international language.

　　A.There B.This

　　C.That D.It

　　答案：D　句意：英語正被接受成為國際性語言是一個事實。此處用it作形式主語，that從句為真正的主語。

　　5.________ made the parents proud was ________ their son had been admitted to a key university.

　　A.What; because B.What; that

　　C.That; what D.That; because

　　答案：B　第一個空用what引導主語從句，what在該從句中充當主語;was后為表語從句，該從句中不缺少任何成分，故用that引導，且不可省略。故選B。

　　6.It worried him a bit ________ his memory was becoming worse.

　　A.while B.that

　　C.if D.what

　　答案：B　it為形式主語，真正的主語從句中不缺少任何成分，故用that引導主語從句，且不可省略。

　　7.(2014·九江高一檢測)________ their flight will arrive on time is ________ they are concerned about.

　　A.Whether; what B.Whether; that

　　C.When; what D.How; that

　　答案：A　根據(jù)語境，主語從句應用whether引導，表示未定的事;what引導表語從句，在從句中作are concerned about的賓語。

　　8.________ makes the book so extraordinary is the creative imagination of the writer.

　　A.That B.What

　　C.Who D.Which

　　答案：B　主語從句缺少主語要用what引導。

　　9.When and why he came here ________ yet.

　　A.is not known B.are not known

　　C.has not known D.have not been known

　　答案：A　句意：他什么時候以及為什么來這兒還不知道。when and why引導的從句作主語，謂語動詞用單數(shù)，且不被知道，故選A。

　　10.He left home several days ago. ________ worries many people and is to be found out.

　　A.Where he has gone

　　B.Where did he go

　　C.Which place has he gone

　　D.Where has he gone

　　答案：A　考查從句的語序。這是一個主語從句，需使用陳述句語序。故選A。