---______ he managed to solve the problem?
---Oh，he turned to Professor Lee for advice.
| A．Was it how that |
| B．Was it that how |
| C．How was it that |
| D．How it was that |
In his speech the headmaster________to the great help the school received from the district government.
| A．expressed |
| B．pointed |
| C．explained |
| D．referred |
John was so________that he could hardly keep his eyes________.
| A．asleep; open |
| B．asleep; opened |
| C．sleepy; open |
| D．sleepy; opened |
He kept the light in his room________the whole night.
| A．burnt |
| B．burning |
| C．burn |
| D．to burn |
________you put your heart into your study, you'll feel________in it.
| A．Once; interest |
| B．If; interested |
| C．Since; interested |
| D．When; interesting |
That is the place where I________when I was a child.
| A．was used to live |
| B．used to living |
| C．used to live |
| D．am used to living |