We took our umbrellas with us when we went out in order to ________us from a heavy rain.
| A．ban |
| B．preserve |
| C．prevent |
| D．protect |
We started early that morning in order that we ____ there before noon .
| A．might get | B．may get | C．would get | D．got |
— ____ 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 |