.Failure can make a positive contribution to your life_________you learn to use it.
| A．since | B．unless | C．until | D．once |
.
I made a call to my parents yesterday. To my disappointment, _________of them answered it.
| A．either | B．none | C．neither | D．nobody |
.
—Can he take charge of the computer company?
—I’m afraid it is _________ his ability.
| A．beyond | B．within | C．of | D．to |
—Since you can't find a better way out for the time being，why not follow his advice?
—Oh，．
| A．I believe not | B．I might as well | C．It doesn't matter | D．I don't care |
It’s a pity that you leave so soon. It’s been so nice having you here.
| A．should | B．could | C．can | D．might |
—It’s reported that the new underground line has been completed．
—Yes but it hasn’t been made clear it’s to be opened to traffic．
| A．that | B．who | C．what | D．when |