The rates (費(fèi)用) at an Internet bar are as follows:
First 30 minutes$3.00       
Every additional (增加的) 15 minutes $2.00
How much does Ginny have to pay if she was on-line for 50 minutes?

A. $5
B. $7
C. $9
B
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科目：初中英語 來源：0108 期末題 題型：單選題

The rates (費(fèi)用) at an Internet bar are as follows:
First 30 minutes $3.00       
Every additional (增加的) 15 minutes $2.00
How much does Ginny have to pay if she was on-line for 50 minutes?
[     ]
A. $5
B. $7
C. $9

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