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單項選擇題

（）in the open air has given you a good color.

A.Work
B.Worked
C.Working
D.To be working

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單項選擇題

The river （） to the east. It is the second longest river in the country.

A.runs
B.is running
C.run
D.ran

單項選擇題

"The ceremony has already started." "Look! The flag（）now."

A.is being raised
B.is risen
C.is being rose
D.is raising