答案：A

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【巧记提示】ad(广告)+mission（代表团),广告中的代表团免收入场费。

【经典例句】Admission to the show is one dollar.

展览的入场费是一美元。

He made an admission that he was the thief.

他承认他是那个贼。

【考点聚焦】 1)作为"进入""入场",是不可数名词。 

2)作为"承认",是可数名词,通常作单数。 

3)词根:admit vt.承认,允许进去。

4)习惯搭配:by/on someone's own admission 正如某人自己所承认的 

【活学活用】 5.翻译句子正如他自己所承认的,汤姆打碎了玻璃杯。 

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答案：Tom broke the glass by/on his own admission.

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【巧记提示】 pro-(居前,领先)+fit(适合)

【经典例句】 He gained a lot of profit from his visit.

他从这次参观中获益很多。

Someone else profits from the situation.

鹬蚌相争,渔翁得利。

It will profit you nothing to do that.

做那件事情对你没有好处。

【考点聚焦】 1) profit作为"好处,益处"讲时,是不可数名词。

2) profit作为"利润",有时可作可数名词。如:

The profits in this business are not large.

这次生意的利润不大。

3)派生词:profitable adj. 有益的;profitably adv. 有益地;profitless adj.没有好处的

4) profit by/from　从......中得益;从......中得到好处,如:

He learned to profit by his mistakes.

他学会了从自己的错误中获益。

【活学活用】 6.用profit的适当形式填空

It would be _________ to do such a thing.Please stop doing it.

答案：profitless

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【巧记提示】equip(装备)+-ment(名词后缀) 

【经典例句】There is a great deal of modern equipment in the lab.

实验室里有许多现代设备。

They carried most of their equipment on their backs.

他们用背运载大多数装备。

【考点聚焦】1) equipment是一个不可数名词。