Many children your age are always a good mood to do what they’re interested in. A. at, inB

Many children your age are always a good mood to do what 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：句意：许多你这个年龄的孩子都有很好的心情去做他们感兴趣的事。介词短语of one’s age和某人同岁；in a good mood有很好的心情。选B。考点: 考查介词短语的用法。

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