單項(xiàng)選擇題

If she wants to stay thin, she must make a（）in her diet.

A.change
B.turn
C.run
D.go

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單項(xiàng)選擇題

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

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

單項(xiàng)選擇題

When Lily came home at 5 p.m. yesterday, her mother（）dinner in the kitchen.

A.cooked
B.was cooking
C.cooks
D.has cooked