81Helen was much kinder to her youngest son than to the others, _____, of course, made the others envy him.
A.who
B.that
C.what
D.which
开始考试练习点击查看答案82Alec asked the policeman ______ he worked to contact him whenever there was an accident.
A.with him
B.who
C.with whom
D.whom
开始考试练习点击查看答案83With the development of agriculture, the people _____ village I taught are now living a happy life.
A.in whose
B.whose
C.in which
D.which
开始考试练习点击查看答案84We shouldn"t spent our money testing so many people, most of _____ are healthy.
A.that
B.which
C.what
D.whom
开始考试练习点击查看答案85Mark was a student at this university from 1999 to 2003, _____ he studied very hard and was made chairman of the Students" Union.
A.during which time
B.for which time
C.during whose time
D.by that time
开始考试练习点击查看答案86Wind power is an ancient source of energy ____ we may return in the near future.
A.to which
B.by which
C.from which
D.on which
开始考试练习点击查看答案87A huge amount of oil was spilt on the East Sea, the caused of ______ are still under investigation.
A.it
B.that
C.which
D.whom
开始考试练习点击查看答案88Her sister has become a lawyer, ____ she wanted to be.
A.who
B.that
C.what
D.which
开始考试练习点击查看答案89China has 56 nationalities, each of ______ has its own characteristics, forming the various and colorfulChinese culture.
A.them
B.what
C.that
D.which
开始考试练习点击查看答案90He made another wonderful discovery, ______ of great importance to science.
A.which I think is
B.which I think it is
C.which I think
D.I think which is
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