单项选择题

People used to think that heavy objects always fell faster than light ______.

A. ones
B. the ones
C. these
D. those
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单项选择题
______ seems as if we are going to have trouble.
A. We
B. It
C. That
D. There
单项选择题
—When shall we meet again —Make it ______ day you like, it's all the same to me.
A. one
B. any
C. another
D. some
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