问题补充:
— Today the forests are getting fewer and fewer,
— We must down too many trees
A. keep people from cutting
B. prevent people from cutting
C. stop people from cutting
D. all the above
答案:
A. keep people from cutting
B. prevent people from cutting
C. stop people from cutting
(答案→)D. all the above
解析:keep people from cutting防止人们砍伐;prevent people from cutting 阻止人们砍伐;stop people from cutting阻止人们砍伐;all the above上面都是。句意:今天森林变得越来越少了。——我们必须防止人们砍伐更多的树木。结合语境可知选D。