题目内容
13．-Hi!John，would you like to play football with us？-Oh，I can't．I ___ my lesson all the morning and still need half an hour．（ ）
| A． | am reviewing | B． | have been reviewing | ||
| C． | have reviewed | D． | reviewed |
分析 --你好约翰，你想要和我们踢足球吗？
--哦，我不能．我整个上午都在做作业，现在还需要半个小时才能完成．
解答 答案：B．根据still need half an hour（还需要半个小时才能完成）可以知道我现在还在做作业，所以做作业从过去开始一直到现在，而且现在正在进行，因此选择B．
点评 考查现在完成进行时．现在完成进行时和现在完成时皆可表示动作对现在产生的结果，但前者所表示的结果是直接的，而后者所表示的则是最后的结果
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