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问题 选择题

-______ she ______ at six every day?

-No, she doesn't.[     ]

A. Does, get up

B. Does, gets up

C. Is, get up

D. Do, gets up

答案

答案：A

填空题

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1.

I ________ ________ at 6: 30 in the morning.

2.

When do you ________ ________ ________?

3.

I usually ________ ________ at school.

4.

Mark does his homework ________ ________ ________ ________.

5.

My sister often ________ ________ ________ at ten o'clock.
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选择题

质量分别为m和2m的两个小球置于光滑水平面上，且固定在一轻质弹簧的两端，已知弹簧的原长为L，劲度系数为k，现沿弹簧轴线方向在质量为2m的小球上有一水平拉力F，使两球一起做匀加速运动，则此时两球间的距离为(　　)

A．

B．

C．L＋

D．L＋
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