Complete the passage with the appropriate words or expressions. Write down the letter before each word or expressions. A. overlook B. planet C. species D. survival E. learn about F. funding G. beneath the surface of H. vital I. exploring J. a drop in the bucket We have spent a great deal of time and money (1) _______space, but remain ignorant about vast areas of our own (2) _________. For we still know little of the world (3)__________ the seas. With so much to (4) ________life in the depths of the ocean it is surprising there is so little (5) __________ for deep sea exploration. It amounts to little more than (6) __________ of what is needed if we are to make full use of this (7)________ resource. Given our growing population the oceans may even hold the key to the (8)________ of our (9) _______. It would be foolish to continue to (10)_______ their importance.