In this area men take off their hats when a woman ______ (enter) the room.
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After driving for thirty miles, Mary suddenly realized that she ______ (drive) in the wrong direction.
She said she _____ (come) to see me when she _____ (finish) her work.
I was unhappy because he ______ (forever find) fault with whatever I did.
人体能量的来源是蛋白质和脂肪。
A. 对
B. 错
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