On____cold morning in___October of 2010,we all saw the first heavy snow.
| A．不填；不填 | B．不填；the | C．a;the | D．a an |
—He should have come to join in the thorough cleaning.
—He _____. I don’t think it was his turn.
| A．needn’t have to | B．needn’t have |
| C．didn’t have to | D．doesn’t need to |
It has been announced that all the students ____ put on masks before going to school in case they are infected with SARS virus.
| A．shall | B．will | C．need | D．may |
Pressed from his parents, and _____ that he has wasted too much time, the boy is determined to stop playing video games.
| A．realizing | B．realized | C．to realize | D．being realized |
Lydia doesn’t feel like _____ abroad. Her parents are old.
| A．study | B．studying | C．studied | D．to study |
A new study indicates that basic steps taken by people daily can go a long way in ____ the greenhouse gas emission.
| A．cutting down | B．taking down |
| C．pulling down | D．breaking down |