are very deligent.A. Both the girlsB. Both theyC. The both girlsD. They of both

问题补充：

are very deligent.

A. Both the girls

B. Both they

C. The both girls

D. They of both

答案：

(答案→)A. Both the girls

B. Both they

C. The both girls

D. They of both

解析：

试比较：1）所有的孩子们 a.all of the children(the不可省) b.all the children(the可改为these或those.) c.all children d.all one’s children 2）.两个孩子（都）a. both of the children (the不可省) b. both (the ) children c. both one’s children。但为了强调或在简答语中，可放在系动词前。