Many children your age are always a good mood to do the things they’re interested in.A.

Many children your age are always a good mood to do the things they’re interested in.
A. at, in
B. of, in
C. at, on
D. of, with

A. at, in(答案→)B. of, inC. at, onD. of, with解析：children of your age 是与你同龄的孩子的意思；in a good mood to do是有…的兴致，想做的意思。都是固定用法。所以本题选B。

我好好复习下