My friend Martin was very sick with a strange fever; ________, he could neither eat nor sleep.
A.as a result
B.after all
C.in addition
D.in a word
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A解析本题考查介词短语。句意：我的朋友马丁由于奇怪的发烧而病得很厉害，因此，他既不能吃也不能睡。as a result结果; after all毕竟，终究；in all总共；as a result of由于……的结果。