When deeply absorbed in work, ______ he often was, he would forget all about eating and sleeping.
| A．that |
| B．which |
| C．where |
| D．when |
You can either have the double room or the family room,________ you want.
| A．whichever | B．whatever | C．whenever | D．however |
Last month, American scientists started working on _____ project aimed at improving _______ ability to predict earthquake.
| A．the; a | B．a; an | C．the; an | D．a; the |
－Does Bill do his new job well?
－_______ his old job. I’m afraid there’s no hope for him.
| A．Not better than | B．No better than | C．Not so well as | D．to lack |
It’s impossible for a person______ a sense of responsibility to succeed.
| A．being lacked | B．lacked | C．lacking | D．to lack |
________ of the truth of the reports, he told his colleagues about it.
| A．Convincing | B．Convinced | C．To convince | D．Having convinced |