once environmental damage ________,it will take many years for the system to recover

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• Once environmental damage _______,it takes many years for the system to reca、has done b、is to doc、 does d、is done
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• 1：_____near the railway station,the Bank of China is easy to find A locating B located C having located D being located为什么?主语是bank 主动呀,为什么不选A?2An awful accident ,however ,_____occur the other day.A dose B did C has to D had to为什么?是什么语法点呀?3Once environmental damage _____,it takes many years for the system to recover.A has done B was doing C dose D is done语法点.For your safety ,at no time ____allow you to take action by yourself .Athe police can B the pol
• 6 .Once environmental damage _______,it takes many years for the system to recover.
• once environmental damage ________,it will take many years for the system to recoverA has done B is to do C does D is done 错在哪?还有D表示什么回答者：匿名 12-2 00:52 xieixe
• Once environmental damage __,it takes many years for the system to recoverA has done B is to do C does D is done
• Once environmental damage __,it takes many years for the system to recover
• Once environmental damage __,it takes many years for the system to recover
• once environmental damage ________,it will take many years for the system to recover
• Once environmental damage _______,it takes many years for the system to rec
• Once environmental damage __,it takes many years for the system to recover
• Once harm is done to the environment,it takes years to have the system recovered.