一道真题,大家看看答案该选什莫?如果答案是B的话,D为何不对?
In 1981 children in the United States spent an average of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly six hours a week.
A) chores; by 1997 they had spent nearly six hours a week
B) chores; by 1997 that figure had grown to nearly six hours a week
C) chores, whereas nearly six hours a week were spent in 1997
D) chores, compared with a figure of nearly six hours a week in 1997
E) chores, that figure growing to nearly six hours a week in 1997 |