【題目】 Life can be hard __________, but you must keep your head held high and stay positive.

Never let anyone bring you down.

A. at all times B. all the time

C. at a time D. at times

【答案】D

【解析】

試題分析：句意：生活可能有時是艱難的，但你必須堅持抬起頭，保持積極的心態(tài)。永遠不要讓任何人使你倒下。at all times 總是，一直；all the time一直；at a time依次，逐一；at times有時，間或。所以選D。

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