All her time ________ experiments, she has no time for films.
| A．devoted to do | B．devoted to doing | C．devoting to doing | D．is devoted to doing |
It was quite a serious accident,________caused by careless driving.
| A．which I think was | B．I think which was |
| C．which I think it was | D．I think which it was |
It was quite a long time________ I made it out what had happened.
| A．after | B．before | C．when | D．since |
—Bruce was killed in a traffic accident.
—________ I talked with him yesterday morning!
| A．What a pity! | B．I beg your pardon? |
| C．Sorry to hear that. | D．Is that so? |
Jane was disappointed that most of the guests______when she_______ at the party.
| A．left; had arrived | B．left; arrived |
| C．had left; had arrived | D．had left; arrived |