题目内容
14.听第10段材料,回答第18至20题.
18.Where does this announcement take place?
A.On TV.
B.In a store.
C.On the radio.
19.How much does the product cost?
A.About twenty dollars each.
B.About ten dollars each.
C.It is free for the first six months.
20.What is the product used to do?
A.To turn on a special alarm.
B.To search your house.
C.To find your things.
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