Ex.3 Choose a\b\c: 13. Tom ______ tennis at the moment. a. am playing b. are playing c. is playing 14. My father ______ a police officer. a. am b. is c. are 15. The children ______ at the Zoo yesterday. a. was b. were c. are 16. Children have ______ toys. a. many b. much c. a lot of 17. Elephants are ______ than monkeys. a. big b. bigger c. the biggest 18. I ______ two sisters. a. have got b. has got c. haves got 19. You ______ run at school. a. can b. must c. mustn't