giúp mình ạ, cảm ơn ạ He said that some permanent stations were to be set up under the sea, and some undersea farms would provide food for the growing population of the world. The divers in both “houses” spent most of their time (7)______ the bottom of the sea. On four occasions, they went down to 360 feet and observed many extraordinary (8)______ of the marine life, some of which had never been seen before. During their stay, Commander Cousteau and his divers reached a depth of 1,000 feet and witnessed a gathering of an immense (9)______ of crabs which numbered, perhaps, hundreds of millions. They also found out that it was (10)______ to move rapidly in the water in a special vessel known as a “diving saucer” 7:A. exploring B. enquiring C. inquiring D. imploring 8:A. breeds B. forms C. castes D. systems 9:A. pack B. flock C. school D. herd 10:A. able B. hardly C. possible D. capable