48. Human heart usually ________________(beat) about 80 times a minute.
49. On average, cats _______________(sleep) about 15 hours a day.
50. Mary ____________________(go) to a new school next term.
51. What ____________you ______________(do) next week?
52. It______________( always/ rain) in London.
53. They ________________( always/ argue)
54. George is great. He____________________(always /laugh)
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