We have spent a great deal of time and money 1 space, but remain 2 about vast areas of our own 3 . For we still know little of the world 4 the seas. With so much to 5 life in the depths of the ocean it is surprising there is so little 6 for deep sea exploration. It amounts to little more than 7 of what is needed if we are to make full use of this 8 resource. Given our growing population the oceans may even hold the key to the 9 of our species. It would be foolish to continue to 10 their importance. 请填写字母代号。 A. funding B. exploring C. survival D. a drop in the bucket E. overlook F. vital G. ignorant H. planet I. learn about J. beneath the surface of