题目内容：

 

A.compared    B. effect    C. course    D. effort    E. improve

Several studies in the past few years have shown that music lessons can have a good  1.  on kids’ brain.

The longer a student learns it, the more greatly he will2. . As little as four months of music lessons can lead to progress during brain development. The study followed a few four to six year old music learners over the  3.   of a year, measuring changes in each kid’s brain. When the scientists  4.   the music learner with a group of non-music learners, they found music students’ brains were developing differently.