He will have to give advice and make decisions as problems arise, and he must know how to get his huge staff to work efficiently with their respective responsibilities.

单项选择题According to the author, a born naturalist should first of all be _____

单项选择题A．extendingB．illustratingC．performingD．conducting

单项选择题she didn’t know__________to express her ideas in English clearly in public .

单项选择题What does a house mean in the United States

单项选择题It is reasonable for people to pursue a career in fields related __________their favorite hobbies .