I think Tom, as the head of a big department, should either study regularly or ____his job.
| A．quits | B．to quit | C．quitting | D．quit |
By the time he _____ back last night, we had got 200 pictures of the Chang'e-3 lunar probe.
| A．came | B．had come | C．was coming | D．would come |
____his great love for the works of J. K. Rowling, he has a broad range of interest in other English writers as well.
| A．In addition | B．As a consequence of | C．Except for | D．Apart from |
---I'm afraid you have the wrong number.
---Sorry! _______.
| A．It's only a coincidence | B．I have put my foot in my mouth |
| C．I was stuck. | D．I hope I didn't bother you |
Five minutes earlier, and we______the last bus.
| A．had caught | B．should have caught | C．could have caught | D．caught |
.You’ll never guess who I met today—my old teacher! We_____for twenty years.
| A．don’t meet | B．haven’t met | C．hadn’t met | D．couldn’t meet |