单项选择题

They were happy with their______ in their studies.

A． great progresses
B． great progress
C． many progresses
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单项选择题
Can you tell me______ .the time is
A． what
B． how many
C． how long
单项选择题
— Is Mr. Li here— No. But he
A． is
B． was
C． is not
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