Having taken our seats,_______________________.
| A．the professor began the lecture |
| B．the lecture began soon |
| C．we were attracted by the lecture soon |
| D．the bell announced the beginning of the lecture |
What a strange man! He loves his wife, but _____ he often beats her.
| A．at a time | B．at one time | C．at times | D．at the same time |
The problem was that it is ___ valuable ___everyday use.
| A．too; to | B．too; for | C．too; of | D．so; that |
But later people developed a way of printing, _____rocks.
| A．used | B．using | C．and use | D．uses |
____Mr Brown’s anger, it was his own son who didn’t agree ____him.
| A．To; with | B．Because of; to | C．With; of | D．For; on |
When he saw all his books _____ here and there on the floor, he knew that something terrible _____.
| A．lying; must have happened | B．lie; must happen |
| C．lay; might have happened | D．had lain; could have happen |