第20题:[单选题]() I will be disappointed to lose Joe as an employee, I am happy to recommend him as a solid addition to your company. If you'd like more information, please do not hesitate to contact me at555.555-5555.
Sincerely,
John Simpson A.Because B.Despite C.For D.Although 参考答案:D
第21题: [单项选择]通畅呼吸道的关键步骤是()。 A. 脱离险区 B. 清除异物 C. 解开领口 D. 开放气道 参考答案:B