—How does the Internet ____us?
—By sharing information free of charge．
A．educate B．improve C．limit D．benefit
The director asked me to finish this task by Sunday．How can I ____to?
A．attempt B．manage C．decide D．happen
The letter Mary had looked forward to ____her last night and she was very excited．
A．reached B．reaching ' C．had reached D．has reached
In the countryside, ____car is not yet ____popular means for transportation．
A．/; a B．a; the C．the; / D．the; a
The news shocked the whole nation ____a strong earthquake hit Yushu on Apr．14, 2010．
A．what B．when C．that D．which
You ____be tired—you have worked only for ten minutes．
A．won't B．mustn't C．needn't D．can't
