sit|sat|sitting|sits

我第二天必须参加考试。

I had to ___sit an exam the next day.

到七月时，我将已经参加完所有考试了。

By July, I will have already ___sat all my exams.

每年许多考生都参加入学考试。

Many candidates ___sit the entrance exam every year.

我的朋友过来，坐在我旁边的沙发上。

My friend came over and ___sat beside me on the sofa.

他们坐在草地上享受阳光。

They ___sat down on the grass to enjoy the sun.

那只猫正坐在窗台上，看着鸟儿。

The cat is ___sitting on the windowsill, watching the birds.

猫坐在窗台上，看着外面的鸟。

The cat ___sits on the windowsill and watches the birds outside.