of all the students,Jack,who always works hard and gets good marks in the examination,is(a)n( )student in his class.

问题描述:

of all the students,Jack,who always works hard and gets good marks in the examination,is(a)n( )student in his class.
A.excellent B.more excellent C.excellenter D.most excellent

D
most excellent 指的是非常优秀