【答案解析】A: When choosing a teacher for business English course, the experience of the teacher's teaching the course is fundamental, the more time a teacher has taught business English, the better. It is often valuable if the teacher have undertaken in-company work, because the teacher gets a deeper understanding of the work environment. And the last is the tuition, ff the tuition is appropriate, then don't hesitate to choose this teacher. B: When selling in a hard market, in order to gain advantages, some strategies must ha maintained. The fundament item is to improve the quality of product, quality is the life of the company. And relationship is also an important item, because strong relationships based tm genuine interest, and compassion create fierce loyalty. Another valuable item is to provide consistent, personalized, responsive, reliable, accurate and professional customer service.