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單項選擇題

（）the War of Independence, the United States was an English colony.

A.Before
B.At
C.In
D.Between

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單項選擇題

（）she seemed to find English very difficult, but later he made very good progress.

A.At the first
B.At present
C.At the present
D.At first

單項選擇題

（）he was tired he went on working.

A.Even
B.Yet
C.Although
D.In spite