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.
-
Achores; by 1997 they had spent nearly six hours a week
分析该选项
-
Bchores; by 1997 that figure had grown to nearly six hours a week
分析该选项
-
Cchores, whereas nearly six hours a week were spent in 1997
分析该选项
-
Dchores, compared with a figure of nearly six hours a week in 1997
分析该选项
-
Echores, that figure growing to nearly six hours a week in 1997
分析该选项
显示答案
正确答案: B