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

发生在过去的将来（1981  1997）为什么会用过去完成时？？？？

发生在过去的将来（1981  1997）为什么会用过去完成时？？？？

这里用的是分号. 而不是主句从句关系. 所以两个句子是有逻辑关系的平行. 1997 并不是过去(1981) 的将来. 既然是平行概念1997 & 1981 都是现在的过去. 而by 有 到....时间 的意思. 所以发生在1997的过去. 有就是和1981的过去是平行概念的过去. 所以had grown ok

欢迎抬杠.

要是写成平行结构的中间用逗号的应该怎么说,这句???????

要是写成平行结构的中间用逗号的应该怎么说,这句???????

明白了，3X

逗号的话，前后两句句子时态肯定不对的

我选d 有例为证，GWD-1-Q7选C

A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980.

1. that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times

2. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times

3. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio

4. CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio

5. CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times

shuang.....