16、Due to the desertification,huge quantities of soil _____each year.
A.is washing,away B.is being washed away
C.are washing away D.are being washed away
科目:高中英语 来源: 题型:
Due to the desertification,huge quantities of soil _____each year.
A.is washing,away B.is being washed away
C.are washing away D.are being washed away
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