Bài 1. Một nguyên tử A nặng hơn nguyên tử O là 2 lần. Viết kí hiệu và gọi tên nguyên tố A.

Bài 2. Một nguyên tử B nhẹ hơn nguyên tử Br 2 lần. Viết kí hiệu và gọi tên nguyên tố B.

Complete the sentences with the words from the box

Uniforms/ boarding/ library/ classmates/ equipment/ excited/ international/ creative.

1. Vy and Phong are ... about their first day at the secondary school.

2. Phong and Duy are in the same class at school. They are ...

3. Most schools require children to wear school ...

4. My sister is very ... . She is very good at painting picturea.

5. A ... school is a school where stdents study and live during the school year.

6. AIS is an ... school in Viet Nam. It provides American education.

7. The school gym has lots of new, mordern ...

8. In the ..., you can read books and papers or borrow them to read at home.