【题目】You can take as many books as you like here for they are free of ________.
A.fare
B.charge
C.money
D.pay

【答案】B
【解析】A.fare车费；B.charge费用，价钱；C.money金钱，资金；D.pay报酬；句意：这里你可以尽可能多地拿书，因为书是免费的。根据句意，故选B。