He ________ whether the articles exhibited at the back of the department store were for sale. [ ]

The man doesn’t have money， so he can’t buy a gift for his son.

The police failed to come up with ______ evidence, and on that account the suspect was released.

e are getting excited, angry or scared, ourbodies also ______many physical changes

Pleasant music is often played_____classes to make students refreshed and relaxed for a while