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单选题
______
A

thought

B

idea

C

opinion

D

advice


参考答案

参考解析
解析:
句意:他们也需要认真思考如何适应这些变化。give thought to sth.思考,考虑。idea后面一般跟of,不跟to,have an idea of知道,了解。opinion“观点,主张”,后可跟to,但其后一般是人,表示给某人提出意见。advice“建议”,后跟to时其后一般也是人,表示给某人提意见。
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