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近来，受新冠疫情影响，学生们都在家上网课。假如你是李华，你发现很多同学不专心致志上网课，而是浪费时间做一些无意义的事情，比如：微信(WeChat)或QQ聊天调侃、浏览网页、沉溺游戏等。
请你根据所给提示，结合自身体会，以“We should stop wasting time.”为题写一篇英语短文呼吁大家珍惜时间，认真学习，努力实现自己的梦想。
要求：1.表达清楚，语句通顺，意思连贯，书写规范；
2.短文中不得出现真实的地名或人名等信息；
3.凡照抄本试卷里的文章段落不得分；
4.词数：80词左右(开头已给出，不计入总词数)。
We should stop wasting time.
Recently, students are having online classes because of COVID-19. But some students waste their time doing meaningless things instead of study.____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
