I think the best way to go to school is by ______underground.
——Why did Tan become interested in the sounds of nature?——__________he thinks the best music comes from nature.
——Could you please tell me _____________?——Yes, she came to teach here just last week.
Most teenagers love fast food, but bad eating habits __________ fast food.
David’s dream in China is to go into the west and __________ an early childhood school there.
__________she is very old, __________ she can still work eight hours a day.