I. Fill in the blanks in the following sentences with the words given below.(答案填写单词前的大写字母编号。每空2分,共20分)A. cancel B. collaboration C. generous D. gratitude E. biography F. impart G. hasty H. prosperous I. render J. upgrade K. prosperous 1. As a teacher he was highly respected for his industry, patience, and his ability to F knowledge.2. Unless a firm can第 一 页 J its products and services