His _________ estimated at fifty million dollars.
| A．wealth is | B．wealths is | C．wealth are | D．wealths are |
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 |
They wouldn’t agree to sell the house to us at the same price_______ they had promised,________ was rather disappointing.
| A．which; as | B．as; that | C．that; that | D．as; which |