The American Civil War lasted four years_______the North won in the end.
| A．after | B．before | C．when | D．then |
Teachers have to constantly update their knowledge in order to maintain their professional _____.
| A．consequence | B．independence | C．competence | D．intelligence |
“I don’t think it’s my _______ that the TV blew up. I just turned it on. That’s all.” said the boy.
| A．error | B．mistake | C．fault | D．duty |
—Hi, Monica. Have you made up your mind yet?
—Well, _______. I think I’m going to take up hairdressing.
| A．sooner or later | B．more or less |
| C．better or worse | D．now and then |
—Look! Somebody _____ the sofa.
—Well, it wasn’t me. I didn’t do it.
| A．is cleaning | B．was cleaning |
| C．has cleaned | D．had cleaned |
The manager is said to have arrived back from Paris where he ____ some European business partners.
| A．would meet | B．is meeting | C．meets | D．had met |