1.What's wrong with his heart?He wants to know.(合并为一句）

1.What's wrong with his heart?He wants to know.(合并为一句）
He wants to know ____ ____ with his heart.
2.He hit his knee on the corner of that table.(改为一般疑问句）
____ he ____ his knee on the corner of the table?
3.The students set out _at eight_ yesterday morning.
_____ _____ the set out yesterday morning?
4.There was a heavy snow last night.(保持原句意思）
It ____ ____ last night.
5.The farmers plant the vegetables in water.They don't plant them in earth.(保持原句意思）
The farmers plant the vegetables in water_____ _____ earth.
第三题是划线提问