句型转换。 1. Is he your friend? (改为复数形式) __
题型：句型转换
问题：
句型转换。
1. Is he your friend? (改为复数形式)
___________ ___________ your ___________?
2. Li Lei brings me a card. (改为一般过去时)
Li Lei ___________ me a card.
3. Jenny does her homework at home. (改为一般疑问句)
___________ Jenny ___________ her homework at home?
4. There are three buses at the bus stop. (对画线部分提问)
___________ ___________ buses ___________ ___________ at the bus stop?
5. It is rainy today. (对画线部分提问)
___________ ___________ ___________ ___________ today?
时，池底的光斑距离出液口
。 
时，池底的光斑到出液口的距离x。 