You can not borrow books from the school library______you get your student card.A,before B,if C,while D,as
____ he was not rich enough to buy whatever he wanted, Edison decided to make his new laboratory the best.
We still cannot persuade him to give up smoking ____ hard we tried.
____ we went those days when we were in the countryside, we were warmly welcomed.
A ____ road goes ____ from our village to the center of the town.
When his mother came in, Charlie pretended _________.