单项选择题
Anyone can get into the club, ______he is a member there.
A.even if
B.unless
C.as that
D.so long as
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单项选择题
I shall make the announcement ______the beginning of the meeting.
A.to
B.for
C.at
D.in
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单项选择题
It is essential that all these figures ______twice.
A.must be checked
B.be checked
C.is checked
D.will be checked
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