新概念第四册第13课练习题及答案Unit 13 ACDAC BDABC AD新概念英语第4册课后习题:Multiple choice questions 多项选择题Choose the correct answers to the following questions.Comprehension 理解1 Deep drilling techniques have improved greatly because _.a.of the need to locate oilb.it is necessary to go down as much as 25,000 feetc.there is no need to send men down deep holes to get oild.of the constant search for mineral deposits2 It”s necessary to put up an oil derrick _.a.because it is like a giant block and tackleb.to rotate the engine at the topc.to control all the equipment needed to drill a deep holed.to decide exactly where to drill for oil3 The only way of knowing what rocks the drill has reached is to _.a.cut clean cylinders of rockb.use the coring bitc.take note of the strata below the surfaced.bring up specimen material from time to time4 If you don”t control the oil pressure _.a.oil will be forced to the surface with great forceb.mud will have to be circulated down the drill pipec.you will have to catch the oil at the surfaced.water will gush to the surfaceStructure 句型5 The holes made for oil go down as _ as 25,000 feet.(1.1)a.manyb.longc.fard.distant6 Nothing has done as _ as to improve deep drilling as the search for oil.(11.3-4)a.manyb.muchc.longd.far7 The geologist needs to know _ rocks the drill has reached.(1.8)a.thatb.whenc.howd.which8 _ we get down to the oil, it usually flows with great pressure.(1.10)a.Immediatelyb.The first timec.Untild.As long asVocabulary 词汇9 The holes are only borings, less than a foot _ .(11.2-3)a.roundb.acrossc.throughd.along10 The engine at the top makes the drill pipe go _.(1.6)a.up and downb.in and outc.round and roundd.deeper and deeper11 _ a sample is obtained with a coring bit.(11.8-9)a.Every now and againb.In one way or anotherc.Often but not alwaysd.After a long time12 We _ avoid the old, romantic idea of a gusher.(1.12)a.make sure web.can”tc.attemptd.try to