61Wind power is an ancient source of energy _______we may return in the near future.
A.on which
B.by which
C.to which
D.from which
开始考试练习点击查看答案62The hiding man made a hole in the wall ______ he could observe the outside.
A.in which
B.by which
C.through which
D.with which
开始考试练习点击查看答案63What have you got ______ will help a cold?
A.what
B.that
C.it
D.who
开始考试练习点击查看答案64This is the very reason ______ he gave for his coming late to the meeting.
A.that
B.which
C.as
D.why
开始考试练习点击查看答案65Children who are not active or ______diet is high in fat will gain weight quickly.
A.what
B.whose
C.which
D.that
开始考试练习点击查看答案66Who is the woman______ is sweeping the floor over there?
A.who
B./
C.that
D.when
开始考试练习点击查看答案67They left without leaving a message, _____ was more than we had expected.
A.what
B.which
C.that
D.when
开始考试练习点击查看答案68As a child, Jack studied in a village school,____is named after his grandfather.
A.which
B.where
C.what
D.that
开始考试练习点击查看答案69He is such a lazy man _______ nobody wants to work with ______.
A.that; /
B.as; him
C.whom; him
D.as; /
开始考试练习点击查看答案70He made another wonderful discovery , ____ of great importance to science.
A.which I think is
B.which I think it is
C.which I think it
D.I think which is
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