单项选择题

I could have called you yesterday, but I______, your telephone number.

A． didn't have
B． won't have
C． hadn't had
D． wouldn't have
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单项选择题
Mary has got a full mark in the test. She _______very hard all these days.
A． will work
B． may work
C． must have worked
D． could have worked
单项选择题
_______people in our village grow tobacco.
A． Not many
B． Only some of
C． Not much
D． Just a few of
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