填空题

The scientists have discovered that ___________________ (这种物质的反应速度是那种物质的3倍).

【参考答案】

this substance reacts three times as fast as that one.

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单项选择题

Why do both explanations (Line 1, Paragraph 3) worry Asian Americans

A．They are afraid that they would again be isolated from American society in general.
B．People would think that Asian students rely on their parents for success.
C．Asian Americans would be a threat to other minorities.
D．American academic achievements have taken on too strong an Asian character.

填空题

but→and

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