[求助]GWD26-20

20.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

answer:B

我选的是D, 哪儿错了呢？

发现以前讨论的链接

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=180055&replyID=&skin=1

同求~