牛津英语9Aunit4 语法学案（无答案）

Unit4 Grammar 一、从A、B、C、D中选出可以填入空白处的最佳答案。 ( )1.I’m looking after Tom today. He’s been in my house___________ 8:00 this morning. A. at B. for C. since D. till ( )2. .__________I am in trouble, my best friend Jim always helps me. A. Whenever B. Whatever C. However D. Never ( )3.Why not___________ your teacher for help when you can’t finish ___________ the story by yourself? A. to ask; write B. to ask; writing C. ask; writing D. asking; to write ( )4.Grace is going to give much money to charity, ___________she is not rich enough. A. if B. unless C. since D. though ( )5.— I hope you don’t mind my opening the window.— _________. It’s much too hot here. A. Certainly B. Of course not. C. All right. D. OK. ( )6.________ he closed the door, he left the house. A. Until B. Before C. After D. Till ( ) 7.She’s been playing the piano __________ she was eight. A. when B. while C. since D. because ( ) 8.It isn’