GWD26--20

jinni

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

这道题目应该选什么呢？答案是 B

但是为什么要用过去完成时呢？如果可以用过去完成时的话，A也比B好呀，对称，又是主动。

ritta

同问，为什么用过去完成时
A中they还指代1981年的小孩，到1997年不应该再是这些小孩了吧

changfuse

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