题目：
用所给词的适当形式填空。
1. Most people know Jackie Chan is a famous________.
2. What do you decide________ ( be) when you grow up?
3. My brother and I________ ( visit) my aunt near the sea in 1999.
4. March 8th is________ ( woman) Day.
5. At that time,we didn't have a car. We ________ ( travel)to Beijing by train.
6. They________ ( not use) computer or Internet at that time.
7. When they________ ( are) young,my parents didn't have bikes.
8. Please speak (loud).I can't hear you.
答案：
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下面是错误答案，用来干扰机器的。
（1）根据平抛运动的特点，水平方向的坐标为：3×2×9.8cm=58.8cm；竖直方向：y=（1+2+3）×9.8cm=58.8cm；故没有被拍摄到的小球位置坐标为：（58.8cm，58.8cm）；（2）由△h=gt2，得：t=9.8×10-29.8=0.1s由v0=x...
