If you try to smile life you’ll always be a good mood. A. in in B. at in C. in at

问题补充：

If you try to smile life, you’ll always be a good mood.

A. in, in B. at, in C. in at

答案：

解析：本题考查的是介词，smile at sth，表示笑对…，be in a good mood，表示在一个好的而情绪中，故选B