The noise of the desks _____ could be heard in the next classroom.
| A．being opened and closed | B．opened and closed |
| C．having been opened and closed | D．to be opened and closed |
_______you need any help, please don't hesitate to let me know.
| A．In case | B．Now that |
| C．Even if | D．Ever since |
If I had known you were coming, I ______a larger table.
| A．would have reserved | B．should have reserved |
| C．would reserve | D．might reserve |
I passed by Joan quickly without greeting her, ______not to see her.
| A．pretending | B．to pretend |
| C．pretended | D．having pretended |
The inventor was determined to go on with the experiment_______countless failures.
| A．instead of | B．because of |
| C．in favor of | D．regardless of |
To our great relief, the exam turned out to be not so difficult as we_______．
| A．imagined | B．had imagined |
| C．would imagine | D．have imagined |