Tham khảo tài liệu 'anh văn toefl structure-029', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Anh văn TOEFL Structure-029 1 The ponderosa pine is of most of the timber used by forest product firms in the Black Hills of South Dakota. u a the source u b as source u c the source which u d because the source 2 Computers that once took up entire rooms are now to put on desktops and into wristwatches. u a small enough u b smaller than u c so small u d as small as 3 According to some educator the goal of teaching is to help students learn what to know to live a well- adjusted and successful life u a do they need u b they need u c they are needed u d as they may need. 4 The sapphire s transparency to ultraviolet and infrared radiation makes in optical instruments. u a it is of use u b it .
