Tham khảo tài liệu 'anh văn toefl structure-036', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Anh văn TOEFL Structure-036 1 Dairy farming is leading agricultural activity in the Unites States. u a a u b at u c then u d none 2 Although thunder and lightning are produced at the same time light waves travel faster so we see the lightning before we hear the under u a than sound waves do u b than sound waves are u c do sound waves u d sound waves 3 Beef cattle of all livestock for economic growth in certain geographic regions u a the most are important u b are the most important u c the most important are u d that are the most important 4 The discovery of the halftone process in photography in 1881 made it photographs in books and newspapers u a the possible reproduction u b possible to .
