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單項選擇題

Don't disturb me. I（）letters all morning and have written ten so far.

A.write
B.have written
C.was writing
D.have been writing

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Mr. Smith（）a most important part in the development of our city.

A. took
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單項選擇題

Could you tell me where Mr. Lake is? ---（）

A.From England
B.At the office
C.He’s working
D.He’s very busy

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