看图，读一读，将字母的序号写在横线上。

A. In winter, it is cold. The ugly duckling has no home. He is very sad.

B. Uncle Lin has a garden. There are many plants in it. He waters them every day.

C. We are three little pigs. We are clever. We are not afraid of the big bad wolf.

D. Mother Duck has some eggs. She sits on the eggs.

— May we leave the classroom now?

— No, you ________. You ________ to leave until the bell rings.

对吸入的空气起预热作用的是

读下面的文言文，完成小题。

越人溺鼠

    鼠好夜窃粟。越人置粟于盎①，恣鼠啮，不顾。鼠呼群类入焉，必饱食而反。越人乃易粟以水，浮糠覆水上，而鼠不知也。速夜，复呼群次第入，咸溺死。

【注释】①盎（àng）：腹大口小的盆子。

下面的句子中，划线的成语使用不恰当的一项是（    ）