阅读下列短文，掌握其大意，然后从各题所给的三个或四个选项中，选出最佳选项。

Like many students, a 12-year-old boy Wang Wei had to learn on line in early 2020. His school1an "e-learning "way for the special period. Students must log in to their classes from home. Teachers must also log in and and2questions. Some teachers create and post videos to teach e-lessons. "There are a lot of3for us as technology develops. They are4for us teachers," says the headmaster. Though e-learning is convenient(便捷), Wang thinks nothing can replace(替代) the learning that happens in areal classroom of students with a teacher5them."