几道英语时态练习1.---Why?Tom,yourshirtissodirty!---Mum,I______mystoreroomdownstairs.A.cleanedB.havecleanedC.wascleaningD.havebeencleaning2.Theywon’tbuynewclothesbecausethey______moneytobuyanewhouse.A.saveB.ha

　　几道英语时态练习

　　1.---Why?Tom,yourshirtissodirty!

　　---Mum,I______mystoreroomdownstairs.

　　A.cleanedB.havecleaned

　　C.wascleaningD.havebeencleaning

　　2.Theywon’tbuynewclothesbecausethey______moneytobuyanewhouse.

　　A.saveB.hasbeensaving

　　C.havesavedD.weresaving

　　E.aresaving

　　3.IknowMr.Brown;we______toeachotherataninternationalconference.

　　A.areintroducedB.arebeenintroduced

　　C.wereintroducedD.hadbeenintroduced

　　请问这几道题应该选什么呢?第二题有个选项是我加上去的,我认为应该是那样的（我加的不是E里的内容,被我调了）,第三题麻烦翻译并解释,