A cat, ______ it is a white one ______ a black one, is considered to be a good cat as long as it can catch mice.
A．both; andB．not only; but also
C．either; orD．whether; or
D

試題分析：句意：一只貓不管是白貓還是黑貓，只要抓住了老鼠就是好貓。A……和……都B不僅……而且。C或者，或者D不管，還是，根據(jù)句意及結(jié)構(gòu)，故選D。
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