题目内容：

（使句子句意不便）
1.The computer isn't cheap enough for me to busy
The computer _______________________________buy
2.I don't know when we should leave for nanjing
I don't know when _____ _____ _____nanjing
3.he didn't do his homework .he sat playing cards
he sat playing cards _____ ______doing his homework
4.Ben is as old as peter
ben is ___ ____ ____peter
5.which do you like better ,a banana or an apple?
_____ _____you _____,a banana or apple?
6.the film began 15minutes ago
the film has ____ ____for 15 minutes
7.jim is the tallest boy in his class
jim is ___than____ ____boy in his class
8.i'd rather have a piece of pizza
_________________have a piece of pizza