【单选题】
— I often feel lonely when I engage in my online learning. ________?— I join the online course community.
①
How do you solve this problem
②
How do you think about it
③
How often do you engage in online learning
④
When do you engage in online learning
【简答题】
Translate the following sentence into ChineseGovernments of many countries have established laws to protect the air, forests and sea resources.
【简答题】
Translate the following sentence into ChineseAt the meeting, they discussed how to keep the lines of communication open between teachers and students.