单项选择题
A．there
B．that
C．it
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单项选择题
A．enjoyingB．workingC．swimming
A．enjoying
B．working
C．swimming
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单项选择题
B
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C
情景：快放暑假了，妈妈让你给上海的爷爷奶...
People all over the world like his...
People study them at schools.
People cover it over the table.