Global warming caused by human being’s casual behaviour has become a major _______ for people all over the world.
| A．conflict | B．concern | C．challenge | D．factor |
It’s not bad manners to play a trick ____ your friend on April Fool’s Day.
| A．in | B．on | C．to | D．about |
You must have been taken ____ by his lies. He is a dishonest man.
| A．in | B．out | C．away | D．off |
I have just ____ her illness. I’ll go to see her tonight.
| A．listened to | B．heard | C．heard from | D．heard about |
Work hard at your lessons, and you’ll ____ your classmates.
| A．catch | B．catch up | C．keep with | D．keep up with |
There’s ____ water on the playground, so we won’t have the P.E. class there.
| A．too many | B．many too | C．too much | D．much too |