HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
4/1.5+4/5.9+4/9.13+…4/2005.2009
=1/1-1/5+1/5-1/9+1/9-1/13+…+1/2005-1/2009
=1-1/2009=2008/2009
Lan always watches TV in the evening.
Many years ago, most people in Viet Nam don't have TV sets
The
I spend two hours watching footbal everyday
Lan wants to make some sandwiches but she does not have any bread
Of