单选题 Customers may also be permitted to ______ their current accounts for a short period in anticipation of a credit item coming in.
A. overextend B. overdraw C. overvalue D. overpay

【正确答案】 B
【答案解析】[解析] overdraw透支。A．overextend货款过多；C．overvalue估价过高；D．overpay多付款。