题目内容
16.According to China Daily,since June 4,when the first oil was discovered,the leaks(泄露)n Bohai Bay _____ at least 5,500sq km of sea.( )A. | have polluted | B. | have been polluted | ||
C. | polluted | D. | were polluted |
分析 根据中国日报的报道,从六月四号第一次发现石油,渤海湾的原油泄露至少已经污染了五千五百平方公里的海域.
解答 答案:A 句中pollute的后接宾语at least 5,500sq km of sea,要用主动;since引导的时间状语表示从过去到现在,是现在完成时态的用法.故选A.
点评 现在完成时表示过去发生的动作对现在造成的影响或结果或表示过去的动作或状态持续到现在.用法有:过去发生的某一动作对现在造成的影响或结果或到现在为止已经发生或完成的动作;表示过去发生的并且持续到现在的动作或状态.
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