基坑预降水阶段，应在降水前（）完成水位观测孔、连续墙顶变形点的埋设。
A、四周
B、三周
C、两周
D、一周
参考答案：D
用所给词的适当形式填空。
1. Look!The cat is ________ (sit) on your chair.
2. My family ________ (be) a big one.
3. Li Ming often ________ (do) homework at 7:00 in the evening.
4. I think you have too many ________ (cloth).
5. Lily often ________ (have) breakfast at 6:00 in the morning.
6. Look at this picture.I am ________ (eat) an apple.
会阴斜(侧)切开可充分扩大 * * ，除用于____________外，还用于____________。
