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听力题目：
17.(A). This tour was a waste of time.
(B). I learned a lot from this tour.
(C). Have there been any tours today
(D). Did you go on this tour
18.(A). She looked through my paper three times.
(B). She couldn’t find my grades.
(C). She didn’t see the mistakes.
(D). She read the paper on the air.
