Qian Xuesen, the father of China's space program, is generally considered as the greatest s in China.
Shanghai is my father's favorite city and it's his (five)time to visit it.
Don't eat too much junk food because it's (healthy).
Helen enjoys (listen) to soft music when she is tired.
We should speak to the old people (polite).
They came up a good idea to keep their classroom clean and tidy.