题目内容
10.Since the time humankind started gardening,we _____to make our environment more beautiful.( )A. | try | B. | have been trying | ||
C. | are trying | D. | will try |
分析 句意:自从人类开始从事园艺工作以来,我们就一直努力使我们的环境更美.
解答 答案B.分析句意和语境可知,句中时间状语"Since the time humankind started gardening"应该用现在完成时,可排除ABC三个选项;再结合句中"try to make our environment more beaufiful"可知动作还在进行并且会一直延续下去,因此用现在完成进行时,B项符合语境,故选B.
点评 本题考查时态的用法.解答此类题目的关键是要读懂句意,分析上下文的语境,判断时态,锁定答案.
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