13. 根据句意及首字母提示填写单词。
(1) Mr. Liu has a d, and her name is Liu Hulan.
(2) Cathy is my a. She is an office worker.
(3) There is(有) a big t in our school. The students often read books under (在……下)it.
(4) We have a long s in our home. We can sit(坐) on it.
(5) I don't have a sister, but I have a b.