I found ______ possible to answer all the questions within the given time.
The moment __________ John will never forget is __________ Mr. Smith gave him a lot of valuable ad-vice on how to improve his writing.
It was reported that a girl suddenly got into a strange situation __________ she was unable to speak.
—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.
Remember that there is still one point __________ we must make clear at the conference tomorrow.【选项 】
American women usually identify their best friend as someone __________ they can talk frequently.