1.-Whendoyouthink_________?-Abouthalfpastfive.Iwillpickhimupattheairport.A.hewill...

引导宾语从句的引导词主要有三类，连词，代词，和副词三类引导词：连词：that,whether,if代词：who,whose,what,which副词：when,where,how,wh...