单项选择题

I would have come sooner but I（）that you were waiting.

A．haven't known
B．hadn't known
C．didn't know
D．have known

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单项选择题

There was not a single person（）thought you were right.

A．which
B．whose
C．he
D．but

单项选择题

Many things（）impossible in the past are common today.

A．to consider
B．considering
C．being considered
D．considered

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