题目内容
18.听第二段对话,完成18--20小题.18.What did Mary want to give back to Fred?
A.His keys.
B.His glasses.
C.His jackets.
19.What did Fred do with his group?
A.They did experiments.
B.They cleaned the streets.
C.They did some shopping.
20.How many times has Yantai been one of the best civilized cities of China?
A.Once.
B.Twice
C.Three times.
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