Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter.
Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter.
(A) it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are (B) it takes the mountain yellow-legged frog of the Sierra Nevada three to four years until it reaches adulthood, and therefore it is (C) in the Sierra Nevada, mountain yellow-legged tree frogs take three to four years to reach adulthood, thus being (D) mountain yellow-legged frogs of the Sierra Nevada take three to four years until they reach adulthood, thus (E) mountain yellow-legged frogs of the Sierra Nevada take three to four years to reach adulthood, and so they are 正确答案是E,问题是一般都是It takes sb +amonut of time to do. 这里某物 takes amonut of time to do. 没有在其他地方找到这种用法 这种用法也是GMAC可以接受的么