（1）知识的桥梁

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（2）门上的钥匙/问题的答案

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（3）课文诠释

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（4）通向房间的走廊

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单项填空

（5）when is the entrance_______ the building?

A. to B. at C. of D. for

(6) He made no response _______my invitation.

A. of B. for C. to D. from

(7) I refused her in response ______the letter.

A. of B. for C. on D. to

2.effect n.效果；作用；影响

用法点拨

（1）effect作"效果，作用，影响"解时，可用作可数名词或不可数名词。

My words had no/little effect on him.

我的话对他不起作用。

The cold in spring usually has bad effect on the growth of plants.

春寒通常对植物生长不利。

（2）effect习惯跟have与on 或upon搭配使用。

This kind of examination has a bad effect on the blood.

这种检查对血液影响不好。

反应练习

单项填空

（1）(2008·泰安月考) The words are_______ on him.

A. of to effect B. without effect

C. have no effect D. not effect