Can you swim well? Are you free on Saturday and Sunday? Our club needs a swimming teacher to teach children  from 8 to 10 years old. It is interesting to be with them. Please call Leo at 5968-4437. Are you busy after school? No? Can you speak English? Yes? Then we need you to help some American students. They study in Beijing. They can't speak Chinese now. They are _ and you can make friends with them. Please email Mr. Liu at helpingus@gmail.com. Can you play the guitar or the drums? Do you have time this Wednesday? Our music club will have a party that day and we need you to join us. It is fun. Please call Sam at 235-1143. Which is true?
Mr. Liu's telephone number is 5968-4437. Children in the swimming club are aged from 5 to 7. If you want to play the drums at the party, you can call Sam. If you want to help the American students, you can call Leo.