he ——in three daysA.is coming backB.came backC.going to come back
问题描述：
he ——in three days
A.is coming back
B.came back
C.going to come back
答
选A,表示将来,意思是他会在三天后回来······B是表过去,不符合.C语法上是错误的,缺少be动词··