1Almost all economists agree that nations, gain by trading with one another.

A work B profit

C rely D prove

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2The conference explored the possibility of closer trade links.

A denied B investigated

C stressed D created

3The chemical is deadly to rats but safe to cattle

A fatal B hateful

C good D useful

4During his lifetime he was able to accumulate quite a fortune.

A control B spend

C collect D exchange

5It's impolite to cut in when two persons are holding a conversation

A leave B talk loudly

C stand up D interrupt

答案：1. B 2. B 3. A 4. C 5. D

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