阅读下列材料，回答下列问题。
As teenagers, we're old enough ________ with housework. We can help set the table, wash the dishes and clean our own rooms.
读一读，填一填。
太阳朝我笑，niǎo____儿喳喳叫。一年级，小学生，背着新书包。唱着歌儿向前走，tiān tiān shàng____ ____ ____ 学不迟到。
世界陆地表面最低处是（ ）
