【正文】
grown B. have grown C. grew D. are growing 2. We have the most population in the world, and most of it _______ farmers. A. to be B. is C. are D. being 3. I thought we’ d be late for the concert, _______ we ended up getting there ahead of time. A. but B. or C. so D. for 4. I have offered to paint the house _______ a week’ s acmodation(膳宿 ). A. in exchange for B. with regard to C. by means of D. in place of 5. He exchanged the b