22. C. opened: The passage states the first supermarket "was opened."
23. B. from: The phrase is "different from."
24. A. customers: Customers are the ones who choose items in a supermarket.
25. B. for: The phrase is "for example."
26. A. who: "Who" is the correct relative pronoun to refer to people (customers).
27. C. playing: The correct form is "to play" or "playing" after "spend time." The sentence should be "You usually spend your free time playing games, don't you?" or "You usually spend your free time to play games, don't you?"
28. A. living: After "used to," the base form of the verb is used. It should be "live." The sentence should be "Jane used to live with her grandparents when she was a child."
29. A. will rain: In a type 1 conditional sentence, the "if" clause uses the present simple, not the future simple. It should be "If it rains heavily tomorrow, we won't go swimming."
30. B. Milk, please: This is the most natural response to "What would you like to drink?"
31. A. look for: "Look for" means to search for something.