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單項選擇題

Is there any reason（）you should go away?

A.why
B.that
C.where
D.as

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Such changes can alter the social structure,（）people to move.

A.leading
B.which led
C.leads
D.which leading

單項選擇題

Cycling is a good exercise.（）, it doesn't pollute the air.

A.Therefore
B.However
C.Moreover
D.But

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