Which of the following is NOT in the sort that you would have bought in the past but now free？
A. Body-building videos.
B. The telephone numbers of government offices.
C. Shakespeare"s Merchant of Venice.
D. Standup comedy shows.
What is the role of Paragraph One in the development of the topic？
A. To introduce a feature that the following paragraphs will deal with in detail.
B. To describe the beginning of a story that the passage is going to reveal.
C. To offer supporting evidence to the following paragraphs.
D. To provide a contrast to the following paragraphs.
《古代图书集成》是我国现存规模最大的类书，它形成于_____。
单杠梯的最大使用人数为1人，安全使用角度为()。
A. 50度---56度
B. 60度---66度
C. 70度---76度
D. 80度---86度
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