it's Saturday today對(duì)Saturday today提問(wèn)
it's find對(duì)find提問(wèn)
they are many children in the park（對(duì)in the park提問(wèn)）
there are two birds in the sky對(duì)two提問(wèn)
a boy is running after a bird（對(duì)a bird提問(wèn)）
he wants to catch it（對(duì)catch 提問(wèn)）
another boy is cleaning the park（對(duì)cleaning the park提問(wèn)）
嗯