IV. Fill in each blank with a suitable preposition. (5 pts)

1. Gangnam Style, by a 34-year-old South Korean Singer, Psy, first appeared ______ YouTube in July.

2. I bought some souvenirs ______ my friends when I was in Nha Trang.

3. Fiona is getting better and better ______ writing compositions.

4. Our country is rich ______ oil and rubber.

5. The school cafeteria only opens ______ lunchtime.

6. My mother is very keen ______ growing roses.

7. The science books are _____ the rack ______ the corner of the room.

8. I am 13 years old now. I prefer to talk ______ people ______ my age.