单项选择题

Questions 5 to 7 are based on the following passage.
Which of the following is mentioned as health food

A．Hot dog.
B．Hamburger.
C．Brown rice.
D．Potato chips.

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问答题

Directions: Describe the birth rate in the graph and the general trend after the founding of our country. And give the reasons. Write approximately 120 words.

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