economic ___

经济改革

• reform

• revolution

• evolution

• innovation

blaze a trail

• 熊熊燃烧

• 开路，带头

• 猛烈开火

• 封锁，围困

以下哪个词可以做permanent的反义词?

• eternal

• perpetual

• temporary

• immortal

Genetic engineering will have ___consequences for mankind.

• A. revolution

• B. revolutions

• C. revolutionize

• D. revolutionary

He likes sports and seems to be ___ enough to climb to the mountain top in an hour.

• vigorous

• conscientious

• conscious

• fatigued

根据重读闭音节规则，以下哪一个单词在变成过去式时 无需 双写最后一个字母？

• sum

• regret

• prefer

• order

请用所给单词的适当形式填空。

They had a ____(cease) quarrel from noon to night.

请用所给单词的适当形式填空。

His efforts to improve his working ability need to be ____(applause).

请用所给单词的恰当形式填空。

To ___(initiative) the conversation bravely is the beginning of success.

以下单词含义与其他三项不同的是？

• crucial

• cruelty

• critical

• vital