参考答案！
16-20 DCDBC 21-25DBDAB 26-30CDBBD 31-35DCCAA 36-40DCBCB
41-45 ACBCD 46-50 CBBDA swimming walked glasses difficult surprised taking crowded mind reasons practiced 61what want to be 62will go on vacation 63what kind of dessert
64remember to close windows 65 what made us relaxed 66 your weekend 67went to Beijing 68how 69visited 70how was the weather /what was the weather like
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