把10、20、30、40、50填在圆圈内使每条直线上三个数的和都等于90。

Jerry does morning exercise every day.(改一般疑问句）
____ Jerry____  morning exercise every day?
The water was too dirty for us to drink.(改为同义词)
The water was ____dirty ____ we couldn't drink it.
I don't know David’s e-mail address.
He doesn't know David's e-mail address, either.(合并一句话)
____he____  I know David's e-mail address.
The author will leave for Xingyi in a month.(对划线线部分提问)
____will the author leave for Xingyi?
I think Allen must be playing basketball with his brother on the playground,
____ ？(写出其反意疑问部分）

— What does the girl look like?

— She is of medium build and has ____ hair.