—I am afraid I can't return the book to you before Friday.
— ______ .
| A．Take your time | B．Be careful |
| C．Not at all | D．Don't be afraid |
—I phoned you at 9 this morning but got no answer.
—I am sorry. I _____ the bell. I _____ in the garden.
| A．didn’t have heard, must have been | B．didn’t have heard, must be |
| C．didn’t hear, must have been | D．didn’t hear, must be |
It’s a shame ______ able to give them any advice.
| A．not to have been | B．to have not been | C．to have been not | D．to not have been |
They ______ so tired if they ______ for a whole day.
| A．wouldn’t feel, didn’t walk | B．wouldn’t feel, weren’t walking |
| C．wouldn’t be feeling, weren’t walking | D．wouldn’t be feeling, hadn’t been walking |
Scarcely had they settled themselves in their seats in the theatre ______ the curtain went up.
| A．then | B．before | C．when | D．then |
What you told me the other day is really true,_______?
| A．isn’t it | B．isn’t what | C．didn’t you | D．wasn’t it |