句子改错 The students have learned five lessons for the end of this term

问题描述:

句子改错 The students have learned five lessons for the end of this term
改错.写出为什么这么改!

for --by
by the end of 到 末为止 用于完成时是since 还是by?by可以用at the and of 吗?不可以表示在末尾哦,谢谢不客气