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問題詳情:

 Totakeexerciseindoorsisless   thanintheopenair.A.fortu...

 To take exercise indoors is less   than in the open air.

A. fortunate                    B. dangerous

C. safe                         D. beneficial

【回答】

【解析】選D。句意:在室內鍛鍊不如在室外益處大。beneficial有益的, 受益的, 符合句意。fortunate幸運的; dangerous危險的; safe安全的。

知識點:形容詞

題型:選擇題