已知△ABC∽△A′B′C′，且AB：A′B′=2：3，S_△ABC+S_△A'B'C′=75，则S_△A'B'C=______．

Dear Ralph,

I’m a newcomer here of a small town. I would                        1. _______

describe myself as shy and quietly. Before my classmates,               2. _______

it seems always difficult for me to do things well as                      3. _______  

them. I'm sure they will laugh to me and see me as                      4. _______

a fool. So I feel unhappy every day.                                     5. _______ 

Besides, I have few friends. I don't know that they                   6. _______

don't like to talk with me. Sometimes, we talked to each other              7. _______ 

very well in class, but after class we become stranger at                  8. _______

once. I am trying to improve the situation since it doesn’t                   9. _______

seem to work. Can you tell me about what I should do?                  10. _______

Yours,

Xiao Wei