— We did not see him at the lecture yesterday．
— You _______ him, since I went to an international conference with him．
| A．mustn’t have seen | B．can’t have seen |
| C．couldn’t see | D．needn’t have seen |
You can hardly imagine the difficulty the woman had _____ her children.
| A．brought up | B．bring up | C．bringing up | D．to have brought up |
The farm as well as its neighbouring hills we once spent so much time _____ on a new look as recently as last year.
| A．on has taken | B．has taken | C．on having taken | D．having taken |
Before you decide to leave your job, _______ the effect it will have on your family.
| A．consider | B．considering | C．to consider | D．considered |
I felt it a great honour ______ to speak to you.
| A．to ask | B．asking | C．to be asked | D．having asked |
When you’re learning to drive, _______ a good teacher makes a big difference.
| A．have | B．having | C．and have | D．and having |