单项选择题

He ______ playing football by his mother on the playground.

A． see
B． saw
C． was seen
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单项选择题
If you fly to Malaysia(马来西亚)from Hong Kong, you'll have to stop in Thailand(泰国) ______.
A． by the way
B． on the way
C． in the way
单项选择题
Thursday is the ______ day of the week.
A． fourth
B． five
C． fifth
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