2. 外语
  3. Summer School and Online Classes In the United States,【T1】______for high school students【T2】______. But【T3】______.【T4】______

Summer School and Online Classes In the United States,【T1】______for high school students【T2】______. But【T3】______.【T4】______

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问题     Summer School and Online Classes
    In the United States,【T1】______for high school students【T2】______. But【T3】______.【T4】______ so【T5】______during the school year.
    Another choice for many students【T6】______.However,【T7】______. Students may also【T8】______. And there may be【T9】______each day. Yet there may also be【T10】______, day or night.
【T9】
选项
答案a required number of hours to spend logged on
解析
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