（2015•黑龙江牡丹江）——More and more students wear glasses in our school these days.——I agree with you. Students ___ keep on doing eye exercises to protect their eyes.

题型：单选题题类：真题难易度：普通

——More and more students wear glasses in our school these days.——I agree with you. Students ___ keep on doing eye exercises to protect their eyes.

A、should B、might C、shall