—Hello, Betty. Is your mother a teacher?  —No, she is a doctor in a _____.

All the ___ in our school enjoyed themselves on March 8th because it was their own holiday. 

— I have ______ in learning chemistry. Could you help me with it?— Sure, I’d love to.

 My sister likes reading. In her room, you can see lots of books and _______.

She sings very well, because she has a good ________ .