Helen ______ go on the trip with us, but she isn’t quite sure yet.
| A．shall | B．must | C．may | D．can |
The moment __________ John will never forget is __________ Mr. Smith gave him a lot of valuable ad-vice on how to improve his writing.
| A．that ； that |
| B．that ； when |
| C．when ； that |
| D．when ； when |
It was reported that a girl suddenly got into a strange situation __________ she was unable to speak.
| A．where |
| B．that |
| C．which |
| D．why |
—When did your cousin begin to show his interest in medicine?
—It was a Saturday __________ she noticed her uncle experimenting on a frog in his lab.
| A．that |
| B．what |
| C．when |
| D．which |
Remember that there is still one point __________ we must make clear at the conference tomorrow.
【选项 】
| A．where |
| B．why |
| C．when |
| D．that |
American women usually identify their best friend as someone __________ they can talk frequently.
| A．who |
| B．about which |
| C．as |
| D．with whom |