41. GWD-23-Q13 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. []处表示划线 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 答案A 请问D哪里有问题 CD讨论是有说 否定应用：not so hard as to 也有人说OG上有写 so X as to Y is not idiomatically correct 不太清楚 请教各位~感谢! --

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