他跟着那位朋友来到教室，受到了同学们的欢迎。
He followed the friend to the classroom and was welcomed by her classmates.
第二天，当丹来到教室时，他看到墙上有一块牌子。
When Dan got to class the next day, he saw a sign on the wall.
来到教室后，如果看不见黑板，我下次就不会再来了。
If I come to the class, and I can't see the chalkboard, I won't come back again.
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