题目内容
He tried his best to solve the problem, _______ difficult it was.
| A.whatever | B.however | C.whichever | D.wherever |
B
试题分析:No matter +特殊疑问词引导让步状语从句,意为:无论…;意为后面接形容词difficult,所以使用how.而不是what. 句意:无论问题有多难,他都全力以赴地解决它。故B正确。
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