他们在操场上。
I saw many of my friends are playing on the playground, so, I and together they play football.
我看到我的很多朋友在操场上玩，于是，我和他们一起踢起了足球。
The adjustable shelf system also works as the playground for his cats. They can jump in between shelves, which are staggered at different heights, and rest on them.
可调节的架子也可以作为猫的游乐场所。他们可以在不同高度交错的架子之间跳来跳去，或者在上面休息。
They are not on the playground but in the classroom.
他们不在操场，而是在教室。
They are playing soccer on the playground.
他们正在操场上踢足球。
They are playing basketball on the playground.
他们在操场上打篮球。
They are also playing football on the playground.
他们也在操场上踢足球。
Where are they ? They must be playing football on the playground now.
他们在哪儿呢？他们一定是正在操场上踢足球了。
They are playing basketball on the playground.
他们正在操场上打篮球。
However, a few students are still worried that there is not enough room on the playground and they may not have enough time to finish their homework.
然而，一些学生仍然很担心操场上没有足够的任他们施展的空间，因为他们担心他们可能完不成作业。
They are playing on the playground.
孩子们正在操场上玩。
They are doing exercises on the playground.
他们正在操场上做操。
They are playing games on the playground.
他们在操场上做游戏。
Look, they are playing soccer on the playground.
瞧！他们正在运动场踢足球！
They are playing football on the playground.
他们正在球场上踢足球。
There are some children on the playground. They are playing games and climbing on a jungle gym.
游乐场里有些孩子，他们在玩游戏，爬攀爬假。
They are watching the basketball game on the playground.
他们正在操场上看篮球比赛。
The students are playing on the playground now. They must have finished their homework.
学生们现在在操场上玩，他们准是完成了作业。
They are kicking the football on the playground now.
他们此时在操场踢足球。
They are kicking the football on the playground now.
他们此时在操场踢足球。
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