Tham khảo tài liệu 'anh văn toefl structure-047', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Anh văn TOEFL Structure-047 1 Geothermal energy is a potentially inexhaustible energy source been tapped by humans for centuries but until recent years only on a small scale u a has it u b has u c that has u d that it has 2 The importance of the hand and more generally of the body in children s acquisition of arithmetic u a can hardly be exaggerated u b hardly exaggerated can be u c can be exaggerate hardly u d exaggerated can be hardly 3 is present in the body in greater amounts than any other mineral. u a Calcium u b There is calcium u c Calcium which u d It is calcium 4 .the evidence is inconclusive it is thought that at least some seals have an echolocation system akin to that of bats porpoises and shrews u a Rather u b .
