往往只看到“牛人”閃耀的成績,，卻忽視其成績背后的勤奮。要知道，那些閃耀的成績都是汗水換來的,，為幫助考生提升成績,，小編整理了成人英語三級考試完形填空練習(xí)及答案四，趕快練習(xí)吧,！
　　Can you imagine living and working in a one-man submarine (潛水艇)? Scientists believe that 1C one-man submarines will be as 2B as automobiles are today.
　　你能想象自己在一個單人潛水艇里工作生活嗎?科學(xué)家們相信,，終有一天單人潛水艇的數(shù)量將會和今天汽車的數(shù)量一樣多。
　　First, 3B , the human problems involved 4B the ocean living will need to be studied in 5C , and scientists have already begun to work in 6C fields as marine biology, ocean currents, and ocean-bottom geology.
　　因此,，首先,，人類的問題涉及到詳盡地研究海洋生命，科學(xué)家們已經(jīng)開始研究海洋生物學(xué),，洋流以及海底地質(zhì)學(xué),。
　　7B studying ocean plants and animals, science may find a(n) 8C for some of our most serious diseases. And we may learn to use 9D plants to increase our world food supply 10D .
　　通過研究海洋動植物，科學(xué)家們可能找到醫(yī)治一些————嚴(yán)重疾病的方法,。同時,，我們也可以學(xué)習(xí)如何利用海洋植物以增加全球食物供應(yīng)量。
　　11C new tools and machines, mining engineers may make 12D possible to get valuable 13B from the ocean. 14C , ocean minerals renew themselves, 15A land minerals, which are gone forever 16C taken out of the earth.
　　使用新型的工具和機器,，采礦工程師將可能從海洋獲得珍貴的植物,。很有希望的是，海洋礦物質(zhì)能夠再生,，而不像陸地上的礦物資源,，一旦從土壤中挖掘出來將不可再生。
　　Above all, the sea has 17A of sPACe, not 18C for floating communities and parks, but also for 19B supplies and for underwater travels.
　　畢竟,，海洋有充足的空間,，不僅可以用于人類居住的海上漂浮社區(qū)和公園，還能用于存儲食物和水下旅行,。
　　Indeed, ocean living will help man in more than physic ways. In the freedom and beauty of the deep sea, man may 20B new sources of joy.
　　確實海洋生命對于人類的幫助不僅僅是具體的,。人類能從深海處的自由和美麗中獲得新的樂趣。
　　1. A. sometimes B. somehow C. someday D. somewhat
　　2. A. much B. many C. well D. fine
　　3. A. however B. therefore C. though D. of all
　　4. A. on B. in C. at D. for
　　5. A. fact B. general C. detail D. short
　　6. A. the B. same C. such D. other
　　7. A. With B. By C. On D. For
　　8. A. key B. way C. cure D. answer
　　9. A. better B. cheaper C. water D. sea
　　10. A. yet B. also C. too D. as well
　　11. A. Through B. To C. With D. In
　　12. A. something B. them C. things D. it
　　13. A. foods B. metals C. plants D. animals
　　14. A. Possibly B. Hopefully C. Fortunately D. Naturally
　　15. A. unlike B. as C. besides D. dislike
　　16. A. while B. before C. once D. when
　　17. A. plenty B. vast C. enough D. many
　　18. A. really B. yet C. only D. simply
　　19. A. maintaining B. storing C. protecting D. preventing
　　20. A. take B. find C. feel D. make