–Look! A man is cutting a tree on the moon.
--It ______ be true. The teacher said there is no air on the moon.
| A．can’t | B．may not | C．shouldn’t | D．mustn’t |
If she________hiking in the mountains tomorrow，I will go there with her．
| A．go |
| B．goes |
| C．will go |
| D．went |
She is________to go to work．
| A．old enough |
| B．older enough |
| C．oldest enough |
| D．the oldest enough |
—Could I use your dictionary？
—________．
| A．Yes，I could． |
| B．No，you couldn’t． |
| C．Of course． |
| D．Yes，I do． |
—Could you please________the floor for me？
—Yes，sure．
| A．cleaning |
| B．to cleaning |
| C．clean |
| D．to clean |
—Would you mind________in the classroom?
—Sorry，I won’t do that again．
A．not running
B．don’t run
C not to run