3. The visitor looks very suspicious hanging around by the bins. Let's keep a ______ eye on him.
(A) vigilant
(B) violent
(C) vulnerable
(D) voluntary
詳解 (共 2 筆)
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這名訪客在垃圾桶旁徘徊,看起來很可疑。...
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The visitor looks ve...
私人筆記 (共 2 筆)
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正確答案:(A) vigilant,表示...
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vigilant 警覺的;警戒的;警惕的...