It is essential that students should not be limited to their classroom and should _______ their knowledge to social life.
| A．apply | B．lead | C．switch | D．add |
Jumping out of ______ airplane at ten thousand feet is quite ______ exciting experience.
| A．/; an | B．/; the | C．an; an | D．the; the |
What do you think ____________ at this time last night?
| A．has he done | B．he has done | C．was he doing | D．he was doing |
I’ll show you a store __________ you may buy all ___________ you need.
| A．where; which | B．in which; that | C．which; that | D．that; that |
A person __________ e-mail account isn’t full won’t be able to send or receive any e-mails.
| A．who | B．whom | C．whose | D．whoever |
I refuse to accept the blame for something _________ was someone else’s fault.
| A．who | B．that | C．as | D．what |