Here are the completed sentences with the appropriate prepositions:

### Exercise 1
1. We are planting some flowers **in** the school garden.
2. Luckily, I arrived **at** school at 7 a.m. this morning.
3. I can hear a loud noise **in** the classroom.
4. There are ten classes **on** each floor.
5. Parents wait for their children **at** the school gate to pick them up.
6. Are Binh and Nguyen reading books **in** the school library?
7. Hanoi – Amsterdam High School for the Gifted is **at** No. 1 Hoang Minh Giam Street.
8. There is a clock **on** the wall.
9. My friends are swimming **in** the pool.
10. Look **at** the new words and repeat after me.

### Exercise 3
1. In Viet Nam, a school day starts from 7 a.m. to 11 a.m **in** the morning.
2. We don’t have Maths **on** Thursdays.

### Exercise 4
1. Did you go to the prom **last night**?
2. Students don’t have to go to school **on** Sundays.
3. Is there a good movie **on** TV tonight?
4. James was born **in** 2009.
5. My birthday is **on** March 16th.
6. I was **not** home when you called me **yesterday** evening.
7. How about meeting **on** Saturday afternoon?
8. Quoc Hoc - Hue is **in** the centre of Hue City.
9. I’m afraid that I am busy **this** week.
10. I will graduate from school **in** three months.

If you need anything else, feel free to ask!