HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
Tom’s decided that this year he’s not going to lose the ___________.
There is a g___ which is walking behind the horses.
Many areas on Earth are _________.
Cho(a,b)=1.Tìm UCLN(7a+9b;3a+8b)