（1）从前, 一位老人住在这座房子里。

      , an old man lived in this house.

（2）我经常晚饭后和妈妈去散步。

I often       with my mother after supper.

（3）有人在敲门。

Someone is   the door.

（4）地上有一本书。请把它拾起来。

There is a book on the ground. Please     .

（5）请稍等一下。我很快就到。

Please . I'll come soon.