这题是A 吗?

app228

    

这题是A 吗?

1.        
GWD 原题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

CindyFarer

B

A中they指代不清,和"children"混淆了