填空题

While I (watch) ______ television, the door bell rang.

【参考答案】

was watching
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flying
单项选择题
A．Pass a letter to Mr. Green.B．Talk to Mr. Green.C．See Mr. Green.D．Ask about Mr. Green.
A．Pass a letter to Mr. Green.
B．Talk to Mr. Green.
C．See Mr. Green.
D．Ask about Mr. Green.
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