It will stop the sand In 1620, about half the USA wa...

Trees can prevent the sand__towords the rich farmland in the southA.MovedB.to moveC.from moving\u9009

C prevent ... from doing \u963b\u6b62\u2026\u2026\u505a\u67d0\u4e8b
\u6811\u80fd\u963b\u6b62\u6c99\u5b50\u79fb\u52a8\u5230\u5bcc\u88d5\u7684\u571f\u5730

\u5c0f\u98981:A\u5c0f\u98981:D\u5c0f\u98981:C \u5c0f\u98981:\u7ec6\u8282\u9898\uff1a\u4ece\u6587\u7ae0\u7684\u53e5\u5b50\uff1aThe Great Green Wall is 7,000 kilometres long,\u53ef\u77e5A\u6b63\u786e\u3002\u5c0f\u98981:\u7ec6\u8282\u9898\uff1a\u4ece\u6587\u7ae0\u7684\u53e5\u5b50\uff1aTrees must be grown all over the world.\u53ef\u77e5D\u6b63\u786e\u5c0f\u98981:\u7ec6\u8282\u9898\uff1a\u4ece\u6587\u7ae0\u7684\u53e5\u5b50\uff1aMore "Great Green Walls" are needed.\u53ef\u77e5\u6211\u4eec\u9700\u8981\u8d8a\u6765\u8d8a\u591a\u7684\u6811\u3002C\u9879\u8868\u8fbe\u4e0d\u5bf9\u3002

第一个空 from
第二个空 towards

应该是 from，to，stop from 固定搭配，move to 表示移动到……
来个例句：This committee would decide when people should move to safer ground.
这个委员会将决定何时转移人群到安全地段

from； across

from ;away

扩展阅读：xbox series x ... howell stop showing off ... which of the following ... his article concerning ... john helped me write ... anything in the shop ... if a doctor had been ... screen will stop update ... booting the kernel ...