Saving energy at school is very important to protect our environment. I always turn off the lights and fans before leaving the classroom. I also make sure to shut down the computers after use. I do these things every day to avoid wasting electricity. These small actions are essential because they help reduce our carbon footprint and preserve natural resources for the future.

1.Students should use online resources for learning.

2.Although she didn't speak English well, she traveled alone to the UK.

1. The students are doing a science experiment in the lab now.

2. Space travel will become affordable for everyone in the future.

3. You shouldn't stay up late watching TV programmes.

a,Quốc gia phong kiến :Đại Cổ Việt.

b,Ở Bắc Việt Nam

a,Đất được hình thành bởi các nhân tố :Đá mẹ,sinh vật,khí hậu thời gian địa hình

b,+Rác thải xả bừa bãi

+Do chất thải hạt nhân

+Xả nước thải công nghiệp tự do