单项选择题

What beneficial result does the volcanic ash have().

A. It served as a fertilizer for crops.
B. It formed a new mountain.
C. It destroyed various insect pests.

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单项选择题

A. At half past four.
B. In an hour.
C. At five o’clock.

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A. During the first week of class.
B. During midterm week.
C. On the last day of Class.

What beneficial result does the volcanic ash have(). 您的浏览器不支持 audio 元素。