Помогите пожалуйста срочно надо решить задания по английскому языку
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1) A: I need some postcards. Where.............I buy them?
    B:  You can buy them at the .......................
2) A: ........................can we buy at Chemist's?
    B: .................................................................
3)A: What .................................they sell at greengrocer's?
    B: They sell ................................................
4)A: Can I buy any youghurt at the ......................................?
   B: Yes, you can