国开《商务英语4》单元自测1（10分） 形考试题 【题目】Travellers, when ____________ the checks, have to sign the checks in the presence of the bank or service clerks. buy buying to buy 试题来源商务英语4 查看整套课程试卷 此内容查看价格为0.2金币，请先登录如有问题，请联系微信客服解决！
