单项选择题
A. a doctor B. an editors C. a teacher D. a salesman E. a lawyer F. an engineer G. a judge H. a guide
A. lectured B. aided C. formed D. trained
A. Aim to limit staff use of certain communication tools. B. Evaluate them in terms of the expenditure involved. C. Select them on the basis of the facilities they offer. D. Encourage more staff to attend training courses in their use.