摘要:1.现成完成时 (1)考查表示所发生的动作或事情对现在的影响或产生的结果 例12Although medical science control over several dangerous diseases, what worries us is that some of them are returning. A. achieved B. has achieved C. will achieve D. had achieved [解析]尽管句中未出现时间状语.我们从句意可以判断出医学已经控制住了一些危险的疾病.所以答案是B. (2)考查表示一个从过去某个时间开始.延续到现在的动作 例13My friend, who on the International Olympic Committee all his life, is retiring next month. A. served B. is serving C. had served D. has served [解析]此题中的时间状语all his life 说明我的朋友从过去到现在一直在奥委会工作.答案应是D. 例14My brother is an actor. He in several films so far. A. appears B. appeared C. has appeared D. is appearing [解析]句中的时间状语so far和现在完成时连用.意为“到目前为止 .所以答案是C.

网址:http://m.1010jiajiao.com/timu3_id_2599711[举报]

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网