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keep, clean, because, lesson, wonderful46. You can _______ the books for three weeks.
47. The park is so _______! I want to visit it tomorrow.
48. We don’t have _______ on Sundays.
49. It’s 4:45 p. m. Kangkang and Michael are doing some _______ in the classroom.
50. Meimei is not happy _______ her pet dog is lost.