Look, john has been playing on the playground for about 30 minutes and he still____A has been Bdoes c has D is 选什么?详细过程

Look, john has been playing on the playground for about 30 minutes and he still____A has been Bdoes c has D is 选什么?详细过程
Look, john has been playing on the playground for about 30 minutes and he still____
A has been Bdoes c has D is 选什么?详细过程

Look, john has been playing on the playground for about 30 minutes and he still____A has been Bdoes c has D is 选什么?详细过程
D
已经玩了30分钟,现在还在(正在)玩 用IS(PLAYING)