Professor Jeffrey’s lecture on the recycling of waste paper and other garbage will show can still be improved.

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问题 Professor Jeffrey’s lecture on the recycling of waste paper and other garbage will show can still be improved.

选项 A、that the municipal authorities have done
B、how those the municipal authorities have done
C、how what the municipal authorities have done
D、that how the municipal authorities have done

答案C

解析 题意为:Jeffrey教授关于废纸和其他垃圾循环使用的报告将说明怎样才能进一步改进市政府已做的工作。
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