Dear me！ Just _____ at the time！ I _____ no idea it was so late.
| A．look, have | B．looking, had | C．look, had | D．looking, have |
I don’t suppose Jim could have done so well in yesterday’s exam , ____________?
| A．do I | B．did he | C．has he | D．could he |
Schools across China are expected to hire 50,000 college graduates this year as short-term teachers, almost three times the number hired last year, ____ reduce unemployment pressures.
| A．helping | B．to have helped |
| C．to help | D．having helped |
It’s quite some time ______ our teammate Wang Qiang got injured in the foot, but we firmly believe it won’t be long _________ he recovers from it.
| A．since; before | B．before; since |
| C．after; when | D．when; after |
----Jack can’t concentrate on his lessons recently.
----Yes, that might _____ his low score in the last test.
| A．stand for | B．apply for | C．account for | D．call for |
There were two boys in the lab, _______ did the experiment successfully.
| A．the clever of whom | B．the cleverer of whom |
| C．the cleverer of them | D．the more clever of them |