题目

下列杂合组合属于测交的是 A.EeFfGg×EeFfGg B.EeFfGg×eeFfGg    C.eeffGg×EeFfGg  D.eeffgg×EeFfGg 答案：DSorry I'm late. The first underground started moving __________ I could get on it.A.whileB.beforeC.as soon asD.after