单项选择题

The reason (why) Jack (failed) to (attend) the lecture is (because) he had a bad cold.

A．why
B．failed
C．attend
D．because
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单项选择题
I (was just) falling (sleep) last night (when) I heard a knock (at) the door.
A．was just
B．sleep
C．when
D．at
单项选择题
John said his mother (would buy) him a (five-speeds) racing bicycle (for) his (sixteenth) birthday.
A．would buy
B．five-speeds
C．for
D．sixteenth
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