They have been doing morning exercises they up.A．since, g
题型：不详难度：来源：
They have been doing morning exercises they up.| A．since, got | B．for, get | C．since, get | D．for, got |
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答案
| A |
解析
试题分析：根据since后面跟从句或表示时间点的短语，for后面跟表示时间段的短语的用法和they可知，后面应该是从句，故应该排除BD；又根据since后面的从句用过去时，可知本题应该选A。
点评：完成本题需要注意两点：一个是since和for都可用于现在完成时，since后面跟从句或表示时间点的短语，而for后面跟表示时间段的短语；一个是since后面应该用过去时。 |
举一反三
Listen, a small number of students ______ in the classroom. | A．talk | B．talks | C．is talking | D．are talking |
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Don’t talk. Your brother _______.| A．sleeping | B．sleeps | C．sleep | D．is sleeping |
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--Where is your teacher now, Jenny?
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--- What did your brother say in the letter?
--- He told me he_____to Shaoxing next week.| A．will return | B．returned | C．was going to return | D．is returning |
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