Task 1:

1. astronaunt (n) phi hành gia 

2. microgravity (n) vi trọng lục 

3. orbit (v) đi theo quỹ đạo 

4. launch (v) phóng 

5. mission (n) nhiêm vụ

6. altitude (n) độ cao (so với mặt nước biển)

7. train (v) đào tạo 

8. experience (v) trải qua 

Task 2:

1. Tet is a festival, which occurs in late January or early February.

N (vật) + which + V /S + V 

2. There are a lot of people who like to do things together.

N (người) + who + V 

3. The book which tells about life on other planets is very interesting.

4. The girls whom we met at the meeting seemed sad.

N (người) + whom + S+ V 

`color{orange}{~LeAiFuRuiHuiBao~}`