Doris' success lies in the fact _________ she is co-operative and eager to learn from others.
| A．which | B．that | C．when | D．Why |
----I really don’t know when we can get over all the troubles.
---- ______! Our troubles will soon be over.
| A．Forget it | B．Cheer up | C．Neither do I | D．What a pity |
It is still a problem ______ to hide the stolen money.
| A．why | B．which | C．where | D．who |
----It is nice. Never before___________ such a special drink!
---- I am glad you like it.
| A．I have had | B．I had had | C．have I had | D．had I had |
______ the hometown, he went back to company.
| A．Having visited | B．Not having visited | C．Visiting | D．Not visiting |
----Will Barbara come to our party?
----I am not sure, because he ____ go to the concert with his friend.
| A．can | B．must | C．should | D．might |