单选题：What does“an ace in the hole”mean?

题目分类：专四
题目类型：单选题
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What does“an ace in the hole”mean? A． Turning failure into succes
B． A winning card used at the right tim
C． The highest and most valuable car
D． Anything kept fit until neede

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Write on ANSWER SHEET THREE a composition of about 200 words

Write on ANSWER SHEET THREE a composition of about 200 words on the following to

分类：专四题型：单选题

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Since the matter was extremely, we dealt with it immediately

Since the matter was extremely, we dealt with it immediately.

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The government __________ regulations that put this old city

The government __________ regulations that put this old city under protection.

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Mr. Charles and Mr. Luoh's research shows that as to marriag

Mr. Charles and Mr. Luoh's research shows that as to marriage, __________． A．wom

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Hedidntcomeyesterday．He__________busyworkinginthelab.

Hedidntcomeyesterday．He__________busyworkinginthelab.A．mustbe B．wouldhavebeen C．

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