選C,注意區(qū)別：
some time:一段時(shí)間
sometime將來或過去的某個(gè)時(shí)間
sometimes 有時(shí)候
they _____exercise after class at school
they _____exercise after class at school
A some time ,B sometime,C sometimes
理由充分
A some time ,B sometime,C sometimes
理由充分
英語人氣：569 ℃時(shí)間：2020-04-04 14:52:21
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