1.There is no doubt ________ Catherine is fond of dancing, for she always practices it on weekends.

　　A. whether B. if C. that D. which

　　【答案】C。解析：考查同位語從句，句意：毫無疑問Catherine喜歡跳舞，因為她總是在周末練舞。分析句子的結構可知，逗號之后為“for”引導的原因狀語從句，逗號之前是主句，主句中結構為"There is no doubt that…"意為"毫無疑問…"，連詞"that"引導同位語從句解釋說明名詞"doubt"的具體內容，同位語從句中句子結構和意思已完整，"that"無意義也不充當成分，只起連接詞的作用.故C為正確答案。

　　2.You have seen the girl ________ sister is a Chinese teacher.

　　A. whom B. of whom C. whose D. of which

　　【答案】C。解析：此句先行詞為the girl，定語從句為sister is a Chinese teacher，二者構成的完整句為The girl’s sister is a Chinese teacher.先行詞的’s所有格構成的所屬關系結構在從句中作定語。故選C。

　　3.He found it increasingly difficult to read, ______ his eyesight was beginning to fail.

　　A. and B. for C. but D. or

　　【答案】B。解析：此題考查原因狀語從句?！癶is eyesight was beginning to fail”是“he found it increasingly difficult to read”的原因，因此本題應選用可以表示原因的連詞for引導原因狀語從句。故選B。

　　4.Mr. Smith used to smoke______, but he has given it up.

　　A. seriously B. heavily C. badly D. hardly

　　【答案】B。解析：seriously認真地;badly嚴重地;hardly幾乎不。smoke heavily煙吸得很厲害。為固定說法。故選B。

　　5.The crazy fans ________ patiently for two hours and they would wait till the movie star arrived。

　　A.were waiting B.had been waiting C.had waited D.would wait

　　【答案】B。解析：因為would wait是過去將來時，可見此事發(fā)生在過去，再結合for two hours可知，wait這個動作是從過去某一時刻開始一直延續(xù)到另一個過去時刻，并且還在等，一直要等到那位影星到來，所以用過去完成進行時：had been doing，因此選B。

　　6.This machine is very easy ________. Anybody can learn to use it in a few minutes.

　　A. operating B. to be operating C. operated D. to operate

　　【答案】D。解析：在句型“主語+be+adj+to do”中，如果這個主語是動詞do的邏輯賓語，故用主動表被動，所以選D。