Our school covers an area of 400 mu, which is _______ as yours.
| A．twice as big | B．twice bigger |
| C．twice the size | D．twice the big |
—Since you like the car so much，why not buy it?
—________，I can't afford it.
| A．As I like it much | B．Much as I like it |
| C．I like it as much | D．As much I like it |
The girl had hardly rung the bell ________ the door was opened suddenly，and her friend rushed out to greet her.
| A．before | B．until | C．as | D．since |
Mary made coffee ________ her guests were finishing their meal.
| A．so that | B．although | C．while | D．as if |
As is reported，it is 100 years ________ Qinghua University was founded.
| A．when | B．before | C．after | D．since |
I'm sorry you've been waiting so long，but it'll still be some time ________ Brian gets back.(2008·北京)
| A．before | B．since | C．till | D．after |