先用动词的适当形式完成下列各句时态
They all_________(enjoy)themselves
Look,two boys_________(play)with yo-yos.A girl_________(fly)a kite.Two children_________(repair) a toy boat
Near the lake,some men_________(fish).Some women_________(sunbathe).Some children_________(practise)_________(swim)in the lake.A man_________(windsurf)
There _________(be)a lake in the park
It's fine Sunday morning
There are many people in the park.