My son __________ his clock when I went to get a cup I __________ in his study.
| A．was winding up; had left | B．would up; had forgotten |
| C．had wounded; left | D．was winding up; forgot |
— Is there any possibility __________ you could pick me up at the airport?
—No problem.
| A．when | B．that |
| C．whether | D．what |
I suggested that we break off for tea in a( n)__________ to reduce nervousness.
| A．attempt | B．thought |
| C．preparation | D．expectation |
It remains __________ whether this teaching method will be better than that one.
| A．to see | B．to be seen |
| C．seeing | D．seen |
It was not until midnight __________ they reached the camp site.
| A．that | B．when |
| C．while | D．as |
His album won several awards at the music festival，__________ was beyond his wildest dream.
| A．which | B．that |
| C．where | D．it |