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單項(xiàng)選擇題

Mr. John was busy,（）he could not come.

A.but
B.therefore
C.and
D.nor

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Mr Wang is going to teach you maths（）one year.

A.with
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單項(xiàng)選擇題

Miss Wang wanted to know（）for the film.

A.why was he late
B.why is he late
C.why he is late
D.why he was late