To provide food, we can kill people then sell their meat, get money to buy seeds then grow, care for and harvest our own vegetables and fruits :D

ta da :)

Khi âm phát ra đến tai trước âm phản xạ

thêm đc từ mà bn :v

We borrowed a lot of books from the library yesterday afternoon.

TK:

Độ dài đáy của hình bình hành là : 

500*2=1000 (m)

S khu rừng là :

1000*500=500000 m2

Đáp số : 500000 m2

1.The cause of some natural disasters hasn't been discovered by scientists

2.My father is not only considerate but also generous

3.The children are looking forward to waiting for the graduation ceremony