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B. with C. and D. as 13. We all enjoy football. It39。s very interesting. A. to play B. playing C. play D. playing the 14. My father shows me how _____ a camera. A. use B. to use C. using D. used 15. Is there less_______ in your city? A. pollution B. trees C. people D. sheep 16. – I’ve got a new dictionary. – How much did you ________ it? A. buy B. spend C. pay for D. cost 17. She tried _______ about her journey, but she found it difficult. A. didn’t to worry B. to not worry C. not worrying D. not to worry 18. My parents want me _____at home every night A. stay B. staying C. to stay D. stays 19. .Could you give me _____ advice A. some B. any C. many D. a lot 20. Maybe he put it in his pocket , ______ he ? A. does B. doesn’t C. did D. didn’t 21. You didn’t feel well. You_________ stay in bed and have a rest. A. should B. will C. would D. shall