.
Work on Rome’s Palatine Hill has turned up a series of discoveries, including____ might be the underground cave .
| A．what | B．which | C．that | D．while |
I was about to give up my effort to solve a problem __________ a good idea struck me.
| A．when | B．while | C．until | D．before |
When someone gets old they often go to live in a home with other old people ________ there are nurses to look after them.
| A．although | B．that | C．where | D．unless |
With a lot of homework _________, Tom didn’t go to the movies with his father.
| A．finished | B．to finish | C．finishing | D．being finished |
It was only with the help of the local guide __________.
| A．was the mountain climber rescued |
| B．that the mountain climber was rescued |
| C．when the mountain climber was rescued |
| D．then the mountain climber was rescued |
—Have you handed in your school-work yet?
—Yes, I have. I guess itnow.
| A．has graded | B．is graded | C．is being graded | D．is grading |