Cleverness is not always a ________ of high grades in exams. You’d better learn knowledge carefully and practice more.
| A．result | B．record |
| C．guarantee | D．reaction |
“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
| A．must be | B．must have been |
| C．might be | D．can have been |
Are you still here？ You ______ home hours ago.
| A．should go | B．should have gone |
| C．might go | D．may have gone |
As she’s not here, I suppose she _____ home.
| A．must go | B．must have gone |
| C．might go | D．might be going |
You _____ him the news; he knew it already.
| A．needn’t tell | B．needn’t have told |
| C．mightn’t tell | D．mightn’t have told |
You _____ practise the drums while the baby is sleeping.
| A．needn’t | B．mightn’t |
| C．mustn’t | D．won’t |