题目内容
20．The boss has never expected that his secretary should such an issue at the meeting．（ ）| A． | bring up | B． | bring down | C． | bring in | D． | bring about |
分析 老板从来没有想到他的秘书竟然在会上会提出这样的问题．
解答 答案A．
bring up提出，养育；bring down 降（价），把（某物/某人）抬下（楼/山）；bring in把…拿进来，收获（庄稼等），赚（钱）；bring about造成，引起[导致]（某事）．句子所表达的意思是"提出问题"，故答案选A．
点评 本题考查动词短语的辨析．英语中有的词组没有捷径，只有平时加强记忆，要注意区别，记忆的时候不能忽视，这是常见的命题方式．平时要加强记忆，做题时，别忘了要结合上下文句意判断．
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9．
Big climate changes in the last million years might have come from something very small dust from outer space．
Earth changes between ice ages and warm periods in a（n） （41）Cthat includes several cycles，including a （42）H one that lasts 100，000years．Scientists （43）Asuggested this cycle might be due to changes in the inflow of cosmic（宇宙） dust．
The idea is that Earth （44）Eabove and below the imaginary planet that runs through the sun and Jupiter（木星），completing a cycle every 100，000years．So maybe it encounters （45）Gvarying amounts of dust during each cycle that produce the climate trend．
Now there is some （46）J，from ancient cosmic dust recovered in ocean-floor drilling near the Azores islands west of Portugal．The large quantity of the dust rises and falls with a wonderful 100，000year cycle during the period analyzed，253，000years to 458，000years ago．Periods of more dust are related to（47）F climates．
But that is a long way from showing that the dust （48）Bclimate．Some scientists argue that it is not clear how cosmic dust would make the climate warmer while dust from volcanoes is known to make it cooler．They say the cosmic dust is so thin that it is hard to see how it could have any climate（49）I．
Nevertheless，the new study shows scientists have to take the cosmic dust idea seriously．
| A．recently B．affects C．pattern D．varied E．floats F．warm G．regularly H．mysterious I．effect J．evidence |
Earth changes between ice ages and warm periods in a（n） （41）Cthat includes several cycles，including a （42）H one that lasts 100，000years．Scientists （43）Asuggested this cycle might be due to changes in the inflow of cosmic（宇宙） dust．
The idea is that Earth （44）Eabove and below the imaginary planet that runs through the sun and Jupiter（木星），completing a cycle every 100，000years．So maybe it encounters （45）Gvarying amounts of dust during each cycle that produce the climate trend．
Now there is some （46）J，from ancient cosmic dust recovered in ocean-floor drilling near the Azores islands west of Portugal．The large quantity of the dust rises and falls with a wonderful 100，000year cycle during the period analyzed，253，000years to 458，000years ago．Periods of more dust are related to（47）F climates．
But that is a long way from showing that the dust （48）Bclimate．Some scientists argue that it is not clear how cosmic dust would make the climate warmer while dust from volcanoes is known to make it cooler．They say the cosmic dust is so thin that it is hard to see how it could have any climate（49）I．
Nevertheless，the new study shows scientists have to take the cosmic dust idea seriously．