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【题目】Tourists should keep in mind that they are representing their motherland while abroad, so they need be _______ about their behaviour.

A. envious B. cautious C. previous D. precious

【答案】B

【解析】

考查形容词辨析。句意:游客应该记住,他们在国外代表着他们的祖国,所以他们需要小心自己的行为。A. envious嫉妒的;B. cautious小心的;C. previous早先的;D. precious宝贵的,故选B。

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