It is said that an ancient Chinese ruler called Shen Nong was the first tea as a drink.(discover)
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.
Changbai Mountain in Jilin Province is a good place to fun.