—Do you regret having left your first job?
—Why should I?I as much,but I enjoy more of it.
| A．didn’t earn | B．don’t earn |
| C．hadn’t earned | D．haven’t earned |
— Why do you look so worried?
—My computer broke down and my essay ______ unfinished since.
| A．had left | B．has been left | C．has left | D．was left |
By no means ______ true that all English people know their own language well.
| A．is that | B．that is | C．is it | D．it is |
Was it in 1969 ________ the American astronaut succeeded ________ landing on the moon?
| A．when；on | B．that；on | C．when；in | D．that；in |
It was not until she collected enough material to create her new novel.
| A．did she begin | B．when she began |
| C．that she began | D．that did she begin |
If our time is usefully employed, it will _____ some useful and important products．
| A．turn out |
| B．refer to |
| C．look up |
| D．carry on |