某急性肾小球肾炎患儿经治疗后好转，准备出院，家长询问何时可以恢复正常活动，正确的说法是（）。

A.红细胞沉降率正常后

B.肉眼血尿消失后

C.Addis计数正常后

D.病后2～3周

E.病后2～3个月

The cartoons made by the artists sell best, but several years ago no one could imagine how great a role he _____

in the field. [ ]

A. was playing

B. was to play

C. had played

D. played