— The air pollution is terrible.
— It will be worse ________ we take action to protect the environment.
| A．if | B．unless | C．until | D．when |
Though he is ___________ at home ,he doesn’t feel _________ for he has many things to do.
| A．alone; lonely | B．lonely; alone |
| C．alone ;alone | D．lonely;lonely |
What bad weather it was ! We decided ___________ .
| A．to go out | B．not to go out |
| C．to not go out | D．not going out |
---Jane , your bedroom is so dirty .
--- Sorry, I’ll _________ .
| A．clean up it | B．clean it up |
| C．clean them up | D．clean up them |
I believe your dream will come true one day if you keep on __________ hard
from now on.
| A．work | B．to work |
| C．working | D．works |
-- Xiao Ming, ________ you have a fever?
--Yes , I do.
| A．are | B．is | C．do | D．does |