With more forests being destroyed in that area, huge quantities of land deserts each year.
A. has been turned into
B. had been turned into
C. is being turned into
D. are being turned into
网友回答
A. has been turned into
B. had been turned into
C. is being turned into
(答案→)D. are being turned into
解析：考查主谓一致和现在进行时的被动：句意：随着森林在这个地区被破坏，每年都有很多土地正被变成沙漠。所以用现在进行时的被动式，而且主语是huge quantities of land，谓语是复数，选D。