填空题

The baby ______ (cry) non-stop for the past hour.

【参考答案】

had been crying
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单项选择题
A．In a college.B．Not very easy.C．English.D．There are four courses.
A．In a college.
B．Not very easy.
C．English.
D．There are four courses.
填空题
at that time
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