题目内容
20．Americans eat ______ vegetables per person today as they did in 1910．（ ）| A． | more than twice | B． | as twice as many | ||
| C． | twice as many as | D． | more than twice as many |
分析 今天美国人均蔬菜的食用量是1910年的两倍多．
解答 答案：D
句意表达的是倍数；倍数的表示法有三种：倍数+as…as…；倍数+比较级+than；倍数+the size/length/weight/wideth/height of．故选D．
点评 本题考查倍数表示法．英语中倍数的表示法有三种：倍数+as…as…；倍数+比较级+than；倍数+the size/length/weight/wideth/height of．学习时，要注意区分和掌握．
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There was a particular method commonly used to tame（驯养）elephants．
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There was a particular method commonly used to tame（驯养）elephants．
When an elephant was very young，one of his（26）D would be tied by a small length of chain （27）Aa post（桩）at night．
In most cases，almost（28）Cthe chain was tied to the little elephant's foot，the young elephant would try to get away． He would （29）Band pull at the chain． But the chain（30）Amove from the post to which it was tied．
So he would pull harder．But the harder he tried the more（31）Bit would cause him．
The next day he would be set free to（32）Awith the other elephants． But at night the same length of chain would come out．
Again he would try to（33）Dthat chain． But there seemed to be no way in which he would be able to（34）C himself．
Many days would（35）Dwith the same pattern．
Soon the young elephant would（36）Cthat no matter how hard he tried he could never gain his
freedom．（37）Dhe would give up． When the chain came out and the（38）Bwent out，he would not try to （39）
A any more．
Years would pass and these small young elephants would grow to become the（40）creatures which we all respect and admire．But at night that very same little chain would be used to tie them to their posts．
Now you would think that weighing several tons，the elephants could（41）break the little chains that once held them as（42）B．And you would be right． With their new（43）it would be easy to tear the chains and the posts now．
（44）D，having learnt all those years ago that it wasn't（45）C，these elephants would never even try．
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