题目内容：

Look!How ___(hard) the students are working!

优质解答

虞其君英语
Look!How ___(hard) the students are working!
答案：hard
中文：看!学生们学习多努力啊!
解析：work hard为努力学习,这里用hard为固定用法.
补充：hard-working 勤奋的,努力的