标题: 求助一道GWD语法 16-41 [打印本页] 作者: lllmmm 时间: 2011-3-27 11:03 标题: 求助一道GWD语法 16-41 Researchers hypothesize that granitic soil is the ideal construction material for the desert tortoise because it is not so hard that it makes burrowing difficult or so soft that it could cause tunnels to collapse.
A. so hard that it makes burrowing difficult or so soft that it could cause B. hard enough to make burrowing difficult or soft enough as to cause C. so hard as to make burrowing difficult or soft enough so it causes D. as hard as to make burrowing difficult or as soft as to cause E. too hard, making burrowing difficult, nor too soft, so as to cause D为什么不对呢？？？作者: eliasfan 时间: 2011-3-27 11:42
因为前面有个not，在这种句型中要用not so + adj ......