单项选择题

In dangerous places, you ______ take care of your child.

A．can
B．may
C．must
D．will
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单项选择题
______ that she didn't do a good job, I don't think I am abler than her.
A．To have said
B．Having said
C．To say
D．Saying
单项选择题
—I'm sorry. I'm late. — ______ , Lin.
A．You're welcome.
B．Go ahead.
C．Don't mention it.
D．No problem.
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