题目内容
17．-Where is your father？-He has______ to Beijing．（ ）| A． | left | B． | went | C． | been | D． | gone |
分析 -你爸爸在哪里？
-他已经去了北京．
解答 答案：C
根据问句：你爸爸在哪里？可以推断出后半句句意：-他已经去了北京．应该用现在完成时，现在完成时态表示过去发生或已经完成的动作对现在造成的影响或结果，现在完成时态的构成：助动词have/has+过去分词，have been to曾经去过某地； have gone to已经去了某地，根据句意：他已经去了北京，故选C．
点评 本题考查的是现在完成时态和几个常见句型的区别，理解句意及掌握几个句型的区别是解题的关键．
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After class or school，don't rush out at the same time．Wait until there are （77）few people trying to leave．When you walk with a crowd of people，stay alert （警惕的） and （78）watchyour steps．Don't play around．Be familiar with your （79）school and learn where the safety exits are．When there's pushing and squeezing （挤），don't move and try to hold on to something．（80）or stay in a corner until the crowd leaves．
| deep watch or school other something accident few happen from |
We feel （74）deeply sorry for the loss of lives．There is （75）nothing we can do to bring the students back，but we can try to prevent （防止） such things from （76）happening again．You should do the following things to prevent a stampede （踩踏）．
After class or school，don't rush out at the same time．Wait until there are （77）few people trying to leave．When you walk with a crowd of people，stay alert （警惕的） and （78）watchyour steps．Don't play around．Be familiar with your （79）school and learn where the safety exits are．When there's pushing and squeezing （挤），don't move and try to hold on to something．（80）or stay in a corner until the crowd leaves．
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| A． | turn on | B． | turn off | C． | turn down | D． | turn up |
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| A． | put up | B． | stand up | C． | cut up |
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