Question

【题目】There is no doubt that IT plays ________important role as a new teaching tool in this era of technology.

A. an;\

B. \;the

C. an; the

D. \;\

Answer 1

【答案】A

【解析】play a role扮演角色，起作用。important是以元音音素开头的单词，所以其前用an; technology为不可数名词，前面不用冠词。