1 Fill in the blanks with correct words in the following table. ( 课本 P19-20) A. explore B. specimen C. species D. assume E. giant F. observe G. elusive H. landmark I. vital J. impact K. array L. overlook M. gear N. hostile O. on the heels of P. from the beginning Q. as yet R. for the first time S. learn about T. feed on U. fit together V. fit into