1. Everyone goes indoors and classes begin again

2. The yard is very noisy until the bell rings

3. Lan learns in a Computer science class to use her computer

4. Students take part in different activities at recess

X. 

3. ... at learning English

4. ... this book cost?

5. ... at swimming

6. ... 500 students in that school

7. ... favourite subject?

8. ... popular activity at recess

XI. 1. everyone goes indoors and classes begin again

2. the yard is very noisy until the bell rings

3. Lan learns to use a computer in her Computer Science class

4. Students take part in different activities at recess