【題目】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】

考查形容詞辨析。句意：游客應(yīng)該記住，他們在國外代表著他們的祖國，所以他們需要小心自己的行為。A. envious嫉妒的；B. cautious小心的；C. previous早先的；D. precious寶貴的，故選B。

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