8. Sulphur has occasionally been found in the earth in an almost pure state.
A) regularly
B) accidentally
C) sometimes
D) successfully .
9. When doves are about two weeks old， they are covered with grey feathers and are ready to try their wings.
A) grow
B) wrap
C) hide
D) test
10. I rarely wear a raincoat because I spend most of my time in a car.
A) normally
B) seldom
C) continuously
D) usually
11. When she was invited to the party， she readilyaccepted.
A) willingly
B) suddenly
C) firmly
D) quickly
12. The dentist has decided to extracther bad tooth.
A) take out
B) repair
C) pull
D) dig
13. You must shine your shoes.
A) lighten
B) clean
C) wash
D) polish
14. The majority of people around here are decent people
A) honest
B) rich
C) good-looking
D) high-ranking
15. A deadly disease has affected these animals.
A) contagious
B) serious
C) fatal
D) worrying