单项选择题
A、 many of which B、 many of them C、 many ones D、 their many
A．Americans take interests in social customs B．Americans do not talk about rank, especially socially C．Americans don’t care much about social rank D．Americans feel uncomfortable when talking about rank
A．they are lacking in management strategies B．they are not good at interpersonal skills C．they cannot improve their technical skills D．they cannot go up through the ranks