1.The missing boy was last seen ____ near the river.A.playin

1.The missing boy was last seen ____ near the river.A.playing B.to be playing C.play D.to pl
1.The missing boy was last seen __A__ near the river.
A.playing B.to be playing C.play D.to play
不是“被看见”吗?为什么不选B?
8.You can’t have the horse ___C__ all the way.It’s too hot.
A.run B.to run C.running D.to be running
让马去跑 意思是让某人做某事 不是用have sb do么 为什么不选A