________________________, and the problem would be straightened out（解决）.
| A．A bit more effort | B．Having a little effort |
| C．If you have a bit more effort | D．There being a little effort |
—Why does the river smell terrible
—Because large quantities of water________．
| A．have polluted | B．is being polluted |
| C．has been polluted | D．have been polluted |
The horse covered the distance in six days_____ the train's 28 hours.
| A．comparing with | B．being compared with |
| C．to compared with | D．compared with |
---We need a person very much to think up a creative idea.
--- ______ the new manager have a try?
| A．Shall | B．Must | C．Should | D．Need |
The young man, who by then ___ admission to Peking University, determined to do some part-time jobs to gain more practical skills.
| A．gained | B．was gaining |
| C．has gained | D．had gained |
---What do you think of the furniture on exhibition?
--- Well, great! But I don’t think much of ____ you bought.
| A．the one | B．it | C．that | D．which |