填空题

I am really sorry to（） (占用了您这么多时间).

【参考答案】

I am really sorry to have taken up so much of your time．

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单项选择题
According to the passage, nowadays what factor is motivating the green-architecture movement further（）

A. The high-developed technology.
B. People’s desire to stay healthy.
C. The high costs of energy.
D. The economics.
填空题
Ravitch hoped that schools should and could act as a counteracting force that would support （）
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