--Alice won’t join in our discussion tonight.
--Oh, she ______. We have already put it off.
| A．mustn’t | B．can’t |
| C．shouldn’t | D．needn’t |
Close the door of fear behind you, and you _____ the door of hope open before you.
A. saw B. have seen C. will see D are seeing
Having checked the doors were closed, and _________ all the lights were off, the boy opened the door to his bedroom.
| A．why | B．that | C．when | D．where |
Do not let any failures discourage you, for you can never tell ______close you may be to success.
| A．how | B．that | C．which | D．where |
It is suggested that all these gifts be mailed immediately _________ in time for Christmas.
| A．in order to have received | B．so as to receive |
| C．so as to be received | D．so as to be receiving |
Chinese scientists have produced an embryo of a giant panda through cloning technology,_____ is a breakthrough ______ could save the endangered animals.
| A．that; which | B．which; that | C．which; what | D．that; what |