单项选择题

Where might this passage come from（）

A．A doctor’s notebook.
B．A diary.
C．A magazine:
D．A school biology book.

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单项选择题

What is important in people’s lives（）

A．The earth.
B．Birds.
C．Scientists.
D．The natur

填空题

A. knock B. knowledge C. kilometer D. knee

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