填空题

It is fundamental that（）(两国调和彼此之间的分歧), or they have to stop their negotiations.

【参考答案】

the two countries reconcile their differences

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单项选择题

It can be inferred from the passage that we should（）.

A. enforce the principle of "positive reinforcement"
B. continue advocating rewarding system in America
C. put more emphasis on use of punishment
D. try to limit the use of rewards and incentives

填空题

Food style originated from （） is very popular nowadays in American parties.