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- 21Evdence has been found through years of study ______ children's early sleeping problem are likely to continue when they grow up.
A.why
B.how
C.whether
D.that
开始考试练习点击查看答案 - 22 ______ travel can broaden your mind , I don't think it's a good idea to spend too much time and money on it .
A.If
B.While
C.Because
D.As
开始考试练习点击查看答案 - 23Part of the reason Charles Dickens loved his own novel, David Copperfield, was ______ it was rather closely modeled on his own life.
A.what
B.that
C.why
D.whether
开始考试练习点击查看答案 - 24You seem to have a ready—made answer _______ I ask you a question.
A.however
B.whatever
C.whichever
D.whenever
开始考试练习点击查看答案 - 25While watching television, ________.
A.the doorbell rang
B.the doorbell was rung
C.we heard the doorbell ring
D.we heard the doorbell rings
开始考试练习点击查看答案 - 26The purpose of the research had a more important meaning for them than_______.
A.ours
B.those of ours
C.it had for ours
D.it did for us
开始考试练习点击查看答案 - 27How can they learn anything _____ they spend all their spare time watching television?
A.for
B.when
C.while
D.because
开始考试练习点击查看答案 - 28We still cannot persuade him to give up smoking ____ hard we tried.
A.so
B.how
C.though
D.however
开始考试练习点击查看答案 - 29The question came up at the meeting _______ we had enough money to change the environment
A.that
B.what
C.whether
D.which
开始考试练习点击查看答案 - 30There is much ______ can be done about the accidents ______ from carelessness.
A.which, arose
B.that, arising
C.which, arisen
D.that, arise
开始考试练习点击查看答案
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