恳请大牛指点迷津！GWD 语法题

20. GWD26-Q20

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                                                                               答案：B

我选的答案是A，请大牛们指点错在哪里，正确答案对在哪里。

A. equally likely to exceed the proposed speed limit as

B. equally likely to exceed the proposed speed limit as they are

C. equally likely that they will exceed the proposed speed limit as

D. as likely that they will exceed the proposed speed limit as

E. as likely to exceed the proposed speed limit as they are                                                                                         答案：E

我选的是A，请指点!

不是NN， 我的解法

1 A 没有体现出差异，前后两句话联系不紧密；they 从语法上来说指代有可能是chores；spent nearly nearly six hours做什么，没有说明

2 选项里应该有they are, 还原为 drivers will be as likely to exceed the proposed speed limits as they are exceeding the current speed limits.