His ability has never been in doubt----the question is ___________ or not he is prepared to work hard.
A．thatB．ifC．whereD．whether
D

試題分析：whether與or not可以連用，if與or not不可以連用，其他的選項(xiàng)都不與or not連用。故選D。
點(diǎn)評：本題難度適中。判斷從句中用哪個(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)。需要考生會分析句子成分理解句意。
即學(xué)即練：Don't leave it _______ the kids can reach it.
A. that            B. if          C. where         D. whether
解析：C。句意：不要把它放在孩子們能夠到的地方。
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