.
Walter offered us a lift when he was leaving the office ，but our work__，we refused the offer．
| A．not being finished | B．not having finished |
| C．had not been finished | D．was not finished |
When asked what they would volunteer to do, ________ said they were willing to do something they could.
| A．half of these | B．half of which |
| C．half of whom | D．half of them |
With ________ successful launch of the first space lab module Tiangong-1, China’s space dream has taken ________ step closer to reality.
| A．the; a | B．不填; a | C．a; the | D．the; 不填 |
-–Do you think that we should make preparations for the competition in advance?
-–Exactly. ______.
| A．Actions speak louder than words |
| B．Fight no battle unprepared |
| C．Better late than never |
| D．A good beginning is half done |
-–Mary knows the city quite well.
--She______ well have been there before.
| A．need | B．could | C．should | D．may |
The past two years ______a sharp rise in oil price, which adds to the burden of auto transportation industry.
| A．has witnessed | B．witnessed |
| C．is witnessing | D．witnesses |