用when,while填空,顺便帮我区别
1.____thealienwasinthemuseum,icalledthepolice
2.theboywaswalkingdownthestreet__aUFOlanded
3._____thealienwasvisitingthemuseum,theboycalledtheTVstation
4.iwascleaningmyroon____thefirebrokeout
5.___LindafinallysawDavy,hewasjumpingwithadog
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