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单项选择题

It is necessary to make a(n) (abstract) while writing a report.

A．summary
B．analysis
C．discussion
D．index

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单项选择题Paragraph 2

单项选择题What is the main subject of the passage

A．Experiments are done to study tomatoes.
B．Tomatoes are delicious food.
C．Many people love eating tomatoes.
D．Eating tomatoes can lower risk for cancer.