1111.Up to now, I haven’t known________that company will buy the machine or not.
A.unless
B.whether
C.though
D.why
开始考试练习点击查看答案12We consider________he should clean the room every day.
A.that it necessary
B.necessary it that
C.it that necessary
D.it necessary that
开始考试练习点击查看答案13There can be no doubt________you will succeed in your scientific research
A.why
B.whether
C.how
D.that
开始考试练习点击查看答案14________they will accept the plan is uncertain.
A.That
B.Whether
C.If
D.Which
开始考试练习点击查看答案15The result is________we have lots of good but not very happy employees.
A.when
B.why
C.what
D.that
开始考试练习点击查看答案16________you said at the meeting is exactly consistent with my ide
A.A.When
B.How
C.What
D.That
开始考试练习点击查看答案17We all wondered________Tom broke up with his girlfriend.
A.that
B.what
C.who
D.why
开始考试练习点击查看答案18Cindy shut the door heavily and burst into tears.No one in the office knew________she was so bad.
A.where
B.whether
C.that
D.why
开始考试练习点击查看答案19________the potato was introduced into Europe is uncertain, but it was probably around 1565.
A.Where
B.When
C.That
D.Why
开始考试练习点击查看答案20It worries her a lot________her son hasn’t contacted her for three days.
A.which
B.that
C.if
D.what
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