A．It's the most important part of communication. B．It's the only way to make an employee look professional. C．It's vital to have good communication between colleagues. D．It's helpful to make a good impression on clients.
A.It's B. B．It's C. C．It's D. D．It's
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D 解析：对话中女士在提到written communication时是这么说的：It is very impo......