The old scientist used to say that knowledge ______ from practice．
| A．was coming | B．comes |
| C．had come | D．would come |
Remember that you won't be able to cancel the contract ____you've signed.
| A．before | B．until | C．once | D．though |
When I was at a loss, the thought of traveling abroad did____to me.
| A．occur | B．happen | C．strike | D．belong |
The project that was put forward at the last meeting for a new theater got through as planned_____ some oppositions.
| A．not to mention | B．as well as |
| C．on account of | D．regardless of |
----You look pale and upset.
----Yes, my girl friend _____ an online chat with me non-stop until six o’clock this morning.
| A．have been having | B．had had | C．was having | D．am having |
When it______the writer’s pastime, I was reminded______of the writer’s love of the sea.
| A．came to; once more | B．talked to; once more |
| C．refers to; again and again | D．took up; once again |