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單項(xiàng)選擇題

Our Accounts Receivable Department has written to you three times;（）,we have had no response to our letters.

A.consequently
B.moreover
C.thus
D.however

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（）in the labor market,he has enrolled in a computer course.

A.Be competitive
B.Being more competitive
C.Being competitive
D.To be more competitive

單項(xiàng)選擇題

Information about the current foreign markets （） very important to our company.

A.is
B.was
C.are
D.were