6．Be careful! The slightest spark（火花）could ______ the fireworks.
| A．set about | B．set off | C．set out | D．set up |
He is believed to be one of the best _____ composers. Although old, he is very much ____ and he can give a ______ description of what happened.
| A．living, alive, lively | B．live, lively, alive | C．alive, live, living | D．lively, living, alive |
Though _____ money, his parents managed to send him to university.
| A．lacked | B．lacking of | C．lacking | D．lacked with |
We set off early ____ next morning and came to ____ unknown valley after about an hour.
| A．the; the | B．the; an | C．/; a | D．/; the |
We such great advance without your efforts. Thanks a lot.
| A．can’t have made | B．couldn’t have made |
| C．were unable to make | D．are unable to make |
Will these vegetables _____ for four to five days in the fridge?
| A．be stayed fresh | B．stay fresh | C．stay freshly | D．be stayed freshly |