八年级英语同义句改写 (7小题）

八年级英语同义句改写 (7小题）
1.It took the girl half an hour to learn to dance、
The girl_____ half an hour____ to dance.
2.The students had a good time in the park yesterday.
The students ___ _____in the park yesterday.
3.Why don't you ask your teacher for help?
What ______ _______ your teacher for help?
4.This problem isn't as difficult as that one.
This problem is ____ difficult______ that one.
5.The coat is so expensive that I can't buy it.
The coat is _______expensive_____me to buy.
6.Taking a walk after supper is good for your health.
______good for our health_____take a walk after supper.
7.I can't finish the work if you don't help me.
I can't finish the work_____ _____help.