填空题

The traffic sign warns us______(be) more careful.

【参考答案】

to be
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单项选择题
A．Sorry, I can’t help you.B．It’s very interesting.C．Yes, I have.D．You can’t ask me that.
A．Sorry, I can’t help you.
B．It’s very interesting.
C．Yes, I have.
D．You can’t ask me that.
填空题
This is a (wide)______ accepted idea.
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