A lot of people don’t learn from their mistakes ______ they get hurt.
A．whetherB．whenC．ifD．unless
D

試題分析：句意：許多人直到他們受傷了，他們才會(huì)錯(cuò)誤中吸收教訓(xùn)。Whether是否；when當(dāng)……時(shí)候；    C. if 如果； unless除非，直到……才。根據(jù)句意故選D。
點(diǎn)評(píng)：本題難度適中。判斷賓語(yǔ)從句中用哪個(gè)連詞，需用記住連詞的用法，在句中的作用，連詞也是高考的熱點(diǎn)，需要考生平時(shí)多練習(xí)。需要考生會(huì)分析句子成分理解句意。
即學(xué)即練：______ it comes to German, I know nothing.
A. Whether     B. When   C. If      D. Unless
解析：B。句意：談到德語(yǔ)，我一竅不通。
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