几道高中英语选择题,急切求助!1、——Letmehelpyoucrossthestreet.——（空）Iamnotthatold.AtakeyoutimeBnowayCcomeonDgoahead2、(空)youranswer,IwouldhavecomebacktwoweeksagoAifireceivedBshouldirece

　　几道高中英语选择题,急切求助!

　　1、——Letmehelpyoucrossthestreet.

　　——（空）Iamnotthatold.

　　AtakeyoutimeBnowayCcomeonDgoahead

　　2、(空)youranswer,Iwouldhavecomebacktwoweeksago

　　AifireceivedBshouldireceivedChadireceivedDificouldhavereceived

　　3、Itriedtwodifferentmethods,yet(空)ofthemseemedtoworkverywell

　　AneitherBnoneCeachDboth

　　求各题的详细解答,不要只有个答案,谢谢了!