Our president calls on people to ________ all the food each meal.
不明飞行物的英语缩略形式是______。A．UFO B. BBC C. NBA
下列图片中表示“停车场”的是______。
This is ______ orange. ______ orange is good.A. an; The B. the; An C. an; A
—Thank you.—______
Bob is ______ friend. ______ is a good boy.
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