In the new curriculum some courses are while others are optional for middle school stude

问题补充：

In the new curriculum, some courses are, while others are optional for middle school students.

A. traditional

B. compulsory

C. impressive

D. significant

答案：

A. traditional

(答案→)B. compulsory

C. impressive

D. significant

解析：形容词辨析。A传统的；B必须的，强制性的；C给人深刻印象的；D重要的；句意：在新课程中，对于中学生来说，一些课程是必须要学的，而有一些是选修的。故B正确。