题目内容
17．-Long time so see!-Oh!It ________ five years since we met last time．（ ）
| A． | was | B． | were | C． | has been | D． | have been |
分析 -好久未见！
-哦，自从上次我们见面已经五年了．
解答 答案：C 根据since we met last time可知，"自从上次我们见面"一直延续到现在它表示一段时间，可知用现在完成时；并且要用延续性动词be，它后面可以跟表示一段时间的状语；现在完成时态的结构为have/has+动词的过去分词，主语是it，所以助动词用has，故选C．
点评 本题主要考查现在完成时，用法：表示过去发生或完成的动作对现在造成的影响或结果，还表示过去发生动作一直持续到现在．其结构是have/has+及物动词的过去分词．此题注意短暂性动词和延续性动词区别．
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| 49．A．water | B．rain | C．plant | D．animal |
| 50．A．much | B．more | C．little | D．less |
| 51．A．and | B．so | C．or | D．but |
| 53．A．sun | B．earth | C．weather | D．sunlight |
| 54．A．already | B．almost | C．ever | D．even |
| 55．A．differently | B．slowly | C．carefully | D．easily． |
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