—Can we ski on this mountain?
—Of course.However, at no time _______ you do so alone.
| A．could | B．might |
| C．need | D．must |
. She made a promise _______ anyone could save her life, she would give him all her wealth.
| A．which if | B．that if | C．that | D．if |
With all the family members ______ on vacation without him, the boy felt extremely lonely and afraid.
| A．to have gone | B．going | C．had gone | D．gone |
Why so many youths are _____ on playing computer games often puzzles us a lot.
| A．fascinated | B．crazy | C．keen | D．fond |
_________ I picked up the receiver, I realized that someone had dialed the wrong number.
| A．The moment | B．A moment ago | C．After a minute | D．Minute after |
.— Thank you for your CD-ROM.I’ll return it as soon as I can.
—_________.I’ve got another one to spare.
| A．No problem | B．No hurry | C．With pleasure | D．Nothing much |