. Who could have ____ that within 10 years he’d be in charge of the whole company
| A．indicated | B．promised | C．supported | D．predicted |
I don't think ___ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |
If you want to borrow a football after school, your student card ___ here.
| A．has to leave | B．must leave | C．has to be left | D．must be left |
You ___ me, but since you have,I’ll keep it secret from others.
| A．needn’t have told | B．didn't need to tell | C．wouldn't have told | D．couldn't have told |
If you have something important to do, you ___ waste any time.
| A．needn’t | B．mustn’t | C．may not | D．won’t |
---Where is my reference book? It was here a moment ago.---Someone ___ it by mistake.
| A．could have taken | B．must take | C．might take | D．must have taken |