单选题：I went along thinking of nothing ________, only looking at t

题目内容：

I went along thinking of nothing ________, only looking at things around me, A．in particular
B．in harmony
C．in doubt
D．in brief

参考答案：

答案解析：

The strongest incentives for energy conservation will derive

The strongest incentives for energy conservation will derive from________.

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We can learn from the passage that ________.A．unfairness exists in salary increa

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