【单选题】Mary spend the whole day window shopping. ______ did she spend.
【单选题】How long did Mary spend trying to find the chickens?
【单选题】A drawee of a bill of exchange has an obligation to pay the bill.
【判断题】出纳签字完毕,记账凭证就不能被修改、删除,只有取消签字后才可以进行修改或删除。
【单选题】Mary spend the whole day window shopping. ______ did she spend.