2) Nora is a secretary. Is she at home now? No, she is at work.
3) This is a musical instrument. Is it a guitar? Yes, it is a guitar.
4) John and Tony are basketball players. Are they short? No, they are tall.
5) Louise and Laura are sisters. Are they twins? Yes, they are twins.
6) Mark is a weightlifter. Is he weak? No, he is strong.