A．had they;whenB．they had;whenC．did they;thanD．they did……

单项选择题All （ ） has alreadly been done.

单项选择题---Why do you conect so many old bikes ---I’ 11 have them （ ） and give away to the children who don’t have bikes

单项选择题---Could you please tell （ ） ---Go up stairs and turn left.

单项选择题---Don’ t be angry with your students when they make mistakes again,will you No,I won’ t I know that （ ） of us are perfelt after all

单项选择题---Was it not until last week （ ） he decided to give up smoking ---No,He began he saw the news film last month.

单项选择题The two generations, It is often not their age, （ ） their education that causes misunder standing.

单项选择题---Have you found the information about famous people （ ） you can use for the report---Not yet,I’11 search some on the Internet.

单项选择题---It’s a long time since I saw my sister. ----（ ）

单项选择题It （ ） be Mike. I saw him go to the library just now.

单项选择题---Sir,could you please put out your cigarette This is a smoke--free(无烟的)school.---（ ）