Many high school students are __________ to go to college, but __________ about failing the entrance examinations.
You'll find taxis waiting at the bus station __________ you can hire to reach your host family.
The prize will go to the writer__________ story shows the most imagination.
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.