单项选择题

—How’ s your new babysitter —We______ask for a better one. All our kids love her so much.

A．should
B．might
C．mustn’t
D．couldn’t
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单项选择题
【C15】
A．the number
B．the quality
C．the places
D．the buyers
单项选择题
—It’ s a pity that you missed the lecture on nuclear pollution. —I______it, but I was busy preparing for a job interview.
A．attended
B．had attended
C．would attend
D．would have attended
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