Isimply couldn’t understand how it _______ that you did so much work in such a short time.
| A．cameup | B．camealong | C．cameback | D．cameabout |
When _______ about their opinion of the effect of modern equipment on their performance of tasks, many young people gave a positive response.
| A．asked | B．asking | C．being asked | D．to ask |
-----Have you heard the amazing news?
-----But it _______ be true. Anyone with common sense won’t believe it.
| A．mustn’t | B．can’t | C．may not | D．shouldn’t |
All 5 children of the Blacks, _______ are now working abroad, will come back for their parents’ 50th wedding anniversary.
| A．two of whom | B．two of them | C．both of whom | D．both of them |
We live in a society _______ there is a great deal of debate about competition.
| A．which | B．where | C．when | D．that |
With his mother_______ him, he is getting on well with his work.
| A．helping | B．to help | C．help | D．helped |