单项选择题

Which of the following is the best title for the passage（）

A．An Extensive Collection of Glass Flowers.
B．The Live Leopold and Rudolph Blaschka.
C．Flowers Native to the United States.
D．Materials Used for Artificial Flowers.

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问答题

A Survey on Reading The Results of Survey on Reading The Number of Students Percentage of the Total The Total Amount of Reading in a Term Reading Speed (words per hour) Performance (scores) 100 40% 350,000 3,000 ＞80 80 32% 300,000 2,500 70-73 60 22% 250,000 2,000 60-69 30 6% ＜100,000 1,500 ＜60 July,2000

单项选择题

This passage mainly talks about （）.

A．the origin of the earth
B．the origin of the ocean
C．the history of the earth
D．the forming of the earth’s crust