Since David ______ downloaded a virus into his computer, he can not open the file now.
| A．readily | B．accidentally | C． horribly | D．irregularly |
They told me that the museum was well worth________.
| A．to visit | B．visiting | C．of being visited | D．to be visited |
Look out! Don’t get too close to the house________ roof is under repair.
| A．which | B．its | C．whose | D．who |
Though he failed in the experiment again and again, he didn’t______, and at last, he made it.
| A．lose his heart | B．lose heart |
| C．break his heart | D．make up his mind |
Only in this way_______ finish the work ahead of time.
| A．they can | B．they can do | C．can do they | D．can they |
--Do you know the man _______ I shook hands just now?
--Yes, I know him. He is a famous actor.
| A．whom | B．who | C．with whom | D．with who |