【题目】Thanks to her determination and perseverance on the piano lesson, she has a ______ grasp of the subject.
A. comprehensiveB. confidential
C. conservativeD. compulsory
在线课程【答案】A
【解析】
考查形容词辨析。句意：由于她在钢琴课上的决心和毅力，她对这个科目有了综合的把握。A. comprehensive综合的；B. confidential机密的；C. conservative保守的；D. compulsory义务的，根据题意，故选A。