汤姆和杰瑞是好朋友，他们经常一起打篮球。

Tom and Jerry are good friends, and ___they often play basketball together.

有人把钥匙落在桌上了，他们应该会回来找的。

Someone left ___their keys on the table; ___they'll probably come back for them.

他们都说早睡早起对身体好。

___They say early to bed and early to rise makes you healthy.