| 31. | The papers were grouped for reading in twos and threes under headings ranging from the straightforward, e . g.
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| 32. | They slip into restaurants and stores in twos and threes, pestering patrons and angering owners with their persistent pitch.
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| 33. | Many regular polytopes, at least in two and three dimensions, exist in nature and have been known since prehistory.
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| 34. | Word had gotten around school about the party, and our Drake classmates were arriving in twos and threes and fours.
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| 35. | They were ordered to destroy their equipment, and make their way home in twos and threes as best they could.
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| 36. | When everyone else seems to be indulging in two and three desserts from the buffet table, it's hard to be abstemious.
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| 37. | But in the past, trees were mainly stolen in twos and threes by people who'd replant them in their back yards.
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| 38. | He whistled and stomped inside the shelter, and more than 100 pigeons flooded into the front cage in twos and threes.
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| 39. | Residents of Altar said the downtrodden strangers began passing through their town a few years ago, arriving in twos and threes.
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| 40. | Suddenly there they were, fluttering up and down in twos and threes and then in dozens, knotting and unknotting as they mated.
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