.—____ when has the country been open to international trade?
—1978, I suppose.
| A．Since | B．In | C．From | D．After |
―What do you think of your new Pad?
―Good. I don’t think I can find a ______ one.
| A．worst | B．best | C．worse | D．better |
—Shall we go for a drink at one o'clock this afternoon?
—________.Will two o'clock be OK?
| A．Sure，it's up to you | B．Sure，no problem |
| C．Sorry，I can't make it | D．Sorry，I'm not available today |
My favorite writer is Mo Yan, some of ________ novels have a surprising ending.
| A．whom | B．his | C．whose | D．Which |
It was a real race________time to get the project done. Luckily，we made it.
| A．over | B．by | C．for | D．Against |
The door________open，no matter how hard she pushed.
| A．shouldn't | B．couldn't | C．wouldn't | D．mightn't |