单项选择题

A．Two different types of bones in the human body.
B．How bones help the body move.
C．How bones continuously repair themselves.
D．The chemical composition of human bones.
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单项选择题
The Pacific is on the east of the North American continent.
A．Y
B．N
C．NG
问答题
For this part, you are allowed 30 minutes to write a composition on the topic Aging of the Population. You should write at least 150 words according to the outline given below in Chinese:1. 我国人口老龄化现象日趋严重；2. 人口老龄化给社会、家庭带来越来越多的负担；3. 如何妥善解决人口老龄化问题。
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