prep2上一道题

小伊YSY

Unlike crested wheatgrass, an alien species from Siberia that forms only shallow roots and produces tall above-ground shoots, native North American grasses develop an extensive root system, allowing for greater enrichment of the soil, but do not grow to be very tall.

(A) native North American grasses develop an extensive root system, allowing for greater enrichment of the soil, but do not grow to be very



(B) native North American grasses develop an extensive root system, which allows for their greater enrichment of the soil, but without growing to be that



(C) the root system of native North American grasses is extensive, allowing for greater enrichment of the soil, but they do not grow to be very



(D) the root system of native North American grasses is more extensive, allowing for the greater enrichment of the soil, but these grasses do not grow to be very



(E) the extensiveness of the root system of native North American grasses allows for their greater enrichment of the soil, but they do not grow to be that

答案A，请教下，大家怎么排除其他误项呢？

531769079

与之前UNLIKE 的平行，所有答案AB中，后面allowing的话 前面是东西 所以不行，因此选A

小伊YSY

谢谢楼上
那么b后面的that high是不是也不够正式呢？