题目：
用动词的适当形式填空。
1. Tom, (not walk) on the grass.
2. The geese (catch)the fish now.
3. What this sign (mean) ?
4. His parents (go)to Beijing last week.
5. We like (play) football after school.
6. Look! The girls (dance)in the hall.
7. (be)there any money in your hand?
8. Who (have)got a boy-game? I (have)got one.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A解析：CT的扫描成像步骤：X线→人体→探测器→A/D转换→计算机重建→D/A转换→显示，与激光相机无关。
