题目内容
17.Lina has been a professional(职业的) tennis player_____1999.( )| A. | for | B. | since | C. | in | D. | before |
分析 李娜从1999年就成为了职业的网球运动员.
解答 答案:B
for加时间段,用于完成时;since加时间点,用于完成时;in加时间段,用于将来时;before加时间点,用于过去时.此处的1999是时间点,且由has been可知时态是现在完成时,所以选B.
点评 考查对时间介词用法的掌握.
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