Three years ago in Beijing, my best friend, David, was hit by a car while riding a bike, _______ a terrible brain injury.
| A．caused | B．to cause | C．causing | D．being caused |
— ____ I go out to play now , Mum ?
— No , you ____ .
| A．May ; shouldn''t | B．Can ; needn''t | C．Must ; can''t | D．May ; mustn''t |
Help me with this suitcase , ____ you ?
| A．don''t | B．will | C．do | D．shall |
Why ____ you keep on troubling me with such questions while I''m busy ?
| A．could | B．can | C．must | D．will |
I saw him leave the office an hour ago . He ____ at this time .
| A．mustn''t be working | B．can''t be working |
| C．can''t work | D．may not being working |
You don''t look well . You ____ have a fever .
| A．might | B．can | C．shall | D．should |