61.We ....... use herbicides, pesticides and fertilizers that harm the environment. A. should not B. should C. will D. does not 62.You ...........change trains at Peterborough if you're going to Newcastle. A. could B. should C. did D. would 63.Tam plays games all the time. He never does his homework. He............... play computer games so much A. should not B. should C. will not D. must 64.Your hair looks awful. You............... have it cut A. can B. should C. shouldn’t D. mustn’t 65.You .........smoke. It's bad for you. A. will B. won’t C. should D. shouldn’t