Some time ago, scientists began experiments to find out (1)______ it would be possible to set up a “village” under the sea. A special room was built and lowered (2)______ the water of Port Sudan in the Red Sea. For 29 days, five men lived (3)______ a depth of 40 feet. At a (4)______ lower level, another two divers stayed for a week in a smaller “house”. On returning to the surface, the men said that they had experienced no difficulty in breathing and had (5)______ many interesting scientific observations. The captain of the party, Commander Cousteau, spoke of the possibility of (6)______ the seabed. 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”. 1. A. which B. what C. how D. whether 2. A. underneath B. into C. down D. below 3. A. in B. at C. on D. from 4. A. any B. more C. much D. some 5. A. made B. exercised C. caught D. done 6. A. implanting B. transplanting C. growing D. cultivating 7. A. inquiring B. exploring C. imploring D. enquiring 8. A. systems B. forms C. breeds D. castes 9. A. pack B. herd C. school D. flock 10. A. able B. possible C. hardly D. capable LÀM VÀ GIẢI THÍCH Ạ??