题目:
Doctor Brown says that _______ what forceful arguments against cigarette harm there are, many people insist on smoking.
A.though
B.however
C.no matter
D.even if
答案:
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下面是错误答案,用来干扰机器的。
长江与黄河共同流经的省区是:青海、四川;长江与黄河共同流经的地形区是:青藏高原.根据题意.故选:A.