12. While my aunt is the breadwinner, my uncle is the_______.
A. housekeeper
B. housemother
C. homeowner
D. homemaker
13. I don't think I can put up with people who drop_______ in public places.
A. rubbish
B. waste
C. litter
D. leftover
14. To save_______ and reduce our carbon footprints we should turn off all our appliances when we don't use them.
A. light
B. energy
C. life
D. environment
15. Our music teacher has been invited to be a_______ in many music competitions and talent shows.
A. fan
B. competitor
C. contestant
D. judge
16. American singer Michael Jackson mode a record when he had got 13 Billboard Hot 100 number one _______.
A. singles
B. single
C. singer
D. singers