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1. —Sally, do you mind if I take off my jacket? —Of course not． ． A. It doesn't matterB. Make yourself at home C. Enjoy yourselfD. Forget it 2. It is impossible to persuade him into doing what he doesn’t want to, for he is ______.3. But for the encouraging cheers from the audience, our team＿＿＿such an important match． A. shouldn't have won B．mustn't have won C. needn't have won D. couldn't have won 4. As the world’s population continues to grow, the ______ of food becomes more and more of a concern. A. worth B. package C. supply D. list 5. Henry made a list of all the possible solutions, ＿＿＿seemed helpful in handling the present situation, though． A. none of them B. none of which C. all of which D. all of them 6. —Lily, you don’t go to that supermarket quite often, do you? —No, I only go there ______ because it’s too far away from my house. A. constantly B. occasionally C. frequently D. eventually 7. Life is like riding a bicycle. ______your balance, you must keep moving. | 
