Bills completed by 2000 laid special emphasis ______ recycling and energy conversion.

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问题 Bills completed by 2000 laid special emphasis ______ recycling and energy conversion.

选项 A、onto
B、in
C、on
D、over

答案C

解析惯用搭配题。lay an emphasis on为惯用搭配，意为“重视…”。其他介词都不与emphasis搭配。

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大学英语四级

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