填空题

Textbooks are used (teach) ______ us how to acquire knowledge.

【参考答案】

to teach
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单项选择题
A．It doesn’t matter.B．Yes, you are.C．Yes, you do.D．You are right.
A．It doesn’t matter.
B．Yes, you are.
C．Yes, you do.
D．You are right.
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