题目内容
6．The old lady likes to keep things in the house，_____ throw them away，though many are useless．（ ）| A． | more than | B． | but also | C． | other than | D． | rather than |
分析 老太太喜欢把东西留在家里，而不是把它们扔掉，尽管很多都没用．
解答 答案：D
A．多于；超出；不只是；B．（不仅…）而且…； 并且；表示强调；C．除了，不同于；D．而不是；宁可…也不愿；此处的意思是：…，而不是…；故选D．
点评 做本题时，首先需要掌握各连词的意义及用法，其次根据句意进行逻辑推理，从而选出相应的连词．
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16．
More recent research has shown that many kinds of amphibians（两栖动物） are declining or have become extinct．Amphibians are animals，such as frogs，that live partly in water and partly on land．And they have been around for over 350million years．They have （41）survived three mass extinctions，including the extinction of the dinosaurs．Why are they dying out now？
The most serious aspect of amphibian loss，however，goes beyond the amphibians themselves．Scientists are beginning to think about what amphibian （42）decline means for the planet as a whole．If the earth is becoming unlivable for amphibians，is it also becoming unlivable for other kinds of animals and human beings as well？
Scientists now believe that amphibian decline is due to several environmental factors．One of these factors is the （43）destruction of habitat，the natural area where an animal lives．Amphibians are very （44）sensitive to changes in their habitat．If they cannot find the right conditions，they will not lay their eggs．These days，as wild areas are covered with houses，roads，farms，or factories，many kinds of amphibians are no longer laying eggs．
There are a number of other factors in amphibian decline．Pollution is one of them．In many industrial areas，air pollution has （45）poisoned the rain，which then falls on ponds and kills the frogs that live there．In farming areas，the heavy use of （46）chemicals on crops has also killed off amphibians．Another factor is that air pollution has led to （47）increased levels of ultraviolet （UV） light．This endangers amphibians，which seem to be （48）especially sensitive to UV light．
All these reasons for the disappearance of amphibians are also good reasons for more general （49）concern．These factors affect human beings，too．
| A．poisoned B．destruction C．survived D．increased E．especially F．chemicals G．concern H．decline I．occasionally J．sensitive |
The most serious aspect of amphibian loss，however，goes beyond the amphibians themselves．Scientists are beginning to think about what amphibian （42）decline means for the planet as a whole．If the earth is becoming unlivable for amphibians，is it also becoming unlivable for other kinds of animals and human beings as well？
Scientists now believe that amphibian decline is due to several environmental factors．One of these factors is the （43）destruction of habitat，the natural area where an animal lives．Amphibians are very （44）sensitive to changes in their habitat．If they cannot find the right conditions，they will not lay their eggs．These days，as wild areas are covered with houses，roads，farms，or factories，many kinds of amphibians are no longer laying eggs．
There are a number of other factors in amphibian decline．Pollution is one of them．In many industrial areas，air pollution has （45）poisoned the rain，which then falls on ponds and kills the frogs that live there．In farming areas，the heavy use of （46）chemicals on crops has also killed off amphibians．Another factor is that air pollution has led to （47）increased levels of ultraviolet （UV） light．This endangers amphibians，which seem to be （48）especially sensitive to UV light．
All these reasons for the disappearance of amphibians are also good reasons for more general （49）concern．These factors affect human beings，too．
14．I just couldn't believe you should have made such a silly mistake．Look!You have __________ such an important document．（ ）
| A． | left off | B． | left out | C． | left alone | D． | left aside |
11．Nancy promised to attend the meeting this morning．However，she didn't __________．（ ）
| A． | turn off | B． | turn down | C． | turn to | D． | turn up |
18．I heard the voices．but couldn't _____ what they were saying．（ ）
| A． | look into | B． | make out | C． | put in | D． | take on |
16．The orange looks dry，but you may be able to ____ a few drops．（ ）
| A． | break out | B． | give out | C． | put out | D． | squeeze out |