You’d better spend your time just on the things you find ______.
| A．worth doing them | B．worth being done |
| C．worthy of doing them | D．worthy of being done |
According to the information from the airline, a small sinking part of the runway of the airport is _____________ for the accident.
| A．to blame | B．to be blamed | C．to blaming | D．to be blaming |
Obviously the measures taken by the local government have ______________ the solution to drinking water problems in this region.
| A．contributed to | B．referred to | C．turned to | D．devoted to |
—We want to finish the task ahead of time.
—You have to _____________, if so.
| A．speed it up | B．take it up | C．pick it up | D．turn it up |
The two men discussed and came to ____________ conclusion that the helicopter would take _______________ place of the car some day.
| A．/; / | B．a; the | C．a; / | D．/; the |
—Could I use your computer for a few minutes, please?
— ________. I’m not using it myself.
| A．Go ahead | B．No way | C．It’s depends | D．Come on |