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28. No one seems to care about the environment, ____________ ?.
29. Do you know where ____________ a book about insects?
30. The new law prevents people ____________ their rubbish in certain areas.
31. Let's walk to the shops instead of taking the car, ____________ ?
32. There isn't much point in trying to save electricity, ____________ ?.
33. Don't drop your sweet wrapper on the floor, ____________ ?
34. 'I went to the exhibition at the natural history museum.'
'Oh, yes? What ____________there?'
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