单项选择题

He had a bad cold. _______ is why he didn't come.

A．It
B．This
C．That
D．What
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单项选择题
At last Iris left her house and got to the railway station. Only _______. the train pulling out of the station.
A．saw
B．having seen
C．to see
D．to have seen
单项选择题
_______, the story appeals to many adult readers, too.
A．Though for children written
B．Thought it written for
C．It was written for children
D．Though written for children
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