______ she is sick or not, she is always happy. [ ]A. Weather B. Whether C.

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______ she is sick or not, she is always happy. [ ]
A. Weather
B. Whether
C. If

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举一反三

I was doing my homework ______ someone knocked at the door. [ ]
A. as
B. at
C. when

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I don"t mind _____ he will come to the party or not this evening. [ ]
A. if
B. whether
C. why

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He does his homework _____ ten o"clock every day. [ ]
A．until
B．for
C．about

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单项选择。I like pandas ______ they are beautiful.

[ ]

A. so
B. and
C. because

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选择填空。You must study English well ______ it is very useful.

[ ]

A．but
B．because
C．so

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