A)tightening
B)intensifying
C)focusing
D)fastening
正确答案:A答案:A
[试题分析]动名词辨析题。
[详细解答]tightenv.变紧,绷紧,拉紧;intensifyvt.加强focusvt.使集中在焦点上;fastenvt.扎牢,扣住。根据句意,这里填入tightening符合句意,故答案为A。

A)tightening
B)intensifying
C)focusing
D)fastening
正确答案:A上一篇 What should a driver do when ascending?A) Rise slowly. B) Breathe faster. C) Relax com
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