单项选择题

It was noisy outside and he tried to make himself ________, but he couldn’t.

A．hear
B．heard
C．hearing
D．be heard
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单项选择题
It is impossible for me to finish so many exercises in ________.
A．such a short time
B．so a short time
C．such short a time
D．a so short time
单项选择题
“I wish we could meet each other again before long.” “________.”
A．So I could
B．So could I
C．So I do
D．So do I
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