标题: 又是一道GWD！！. GWD26-Q20 [打印本页] 作者: 茉莉蔷薇 时间: 2011-6-11 09:07 标题: 又是一道GWD！！. GWD26-Q20 In 1981 children in the United States spent an averageof slightly less than two and a half hours a week doinghousehold chores; by 1997 they had spent nearly six hours a week. D
A.chores; by 1997 they had spent nearly six hoursa week
B.chores; by 1997 that figure had grown to nearlysix hours a week
C.chores, whereas nearly six hours a week werespent 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
D错在拿chores和figure of 6 hours在比肯定是不对了？
by+time 的意思是 not later than，截止1997年的意思，所以应该用过去完成时。 个人感觉，这个by 和grow 呼应的很好，把一个过程个清楚的描述出来了，呵呵
In 1981 children in the United States spent an averageof slightly less than two and a half hours a week doinghousehold chores; by 1997 that figure had grown to nearlysix hours a week 作者: 云游 时间: 2013-10-11 13:26
我觉得A是时态问题：
In 1980 children did...; by 1997, children had done...
A中需要对比两个时代children所花时间的不同，用完成时表达不出对比的含义。
最好就是用过去时；in 1997, children spent nearly 6 hours a week.