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.
Ait takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are 分析A选项
Bit takes the mountain yellow-legged frog of the Sierra Nevada three to four years until it reaches adulthood, and therefore it is 分析B选项
Cin the Sierra Nevada, mountain yellow-legged tree frogs take three to four years to reach adulthood, thus being 分析C选项
Dmountain yellow-legged frogs of the Sierra Nevada take three to four years until they reach adulthood, thus 分析D选项
Emountain yellow-legged frogs of the Sierra Nevada take three to four years to reach adulthood, and so they are
看了LZ的问题和前面的回复,我觉得有些问题必须要说明下。
针对LZ的问题,1,and so 这么用在一起一点问题都没有,(这点LZ应加强语法训练)2,D选项的主要问题是由于用了until they reach adulthood作从句,造成了thus restricted 很容易被认为是连接until。。。这个从句来修饰这个从句的状语。所以造成了句意的混乱,所以错了。3,E选项中and so和主句并列,所以they指代主语frogs一点问题都没有,无指代错误。
看了LZ的问题和前面的回复,我觉得有些问题必须要说明下。
针对LZ的问题,1,and so 这么用在一起一点问题都没有,(这点LZ应加强语法训练)2,D选项的主要问题是由于用了until they reach adulthood作从句,造成了thus restricted 很容易被认为是连接until。。。这个从句来修饰这个从句的状语。所以造成了句意的混乱,所以错了。3,E选项中and so和主句并列,所以they指代主语frogs一点问题都没有,无指代错误。