题目内容
5.Pollution will remain a global problem for a long time _____ much has been done to solve it.( )A. | since | B. | unless | C. | though | D. | if |
分析 污染长期以来一直是全球问题,尽管为了解决这个问题已经做了很多.
解答 答案C."since"自从,由于,因为,既然;"unless"除非,如果不;"though"尽管,虽然(引导让步状语从句);"if"如果.根据句意,污染长期以来一直是全球问题,尽管为了解决这个问题已经做了很多.故选C.
点评 本题考查从属连词的用法,要掌握连词的意思并结合具体的语境选择出正确的选项.
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