根据短文内容，选择所给词的适当形式完成短文。                

The most important person in the world is your mother. She looks after you all the ____ .On cold winter days, she always tells you ____on more clothes. She always stands in the wind waiting for you back from school every day. When you hurry to leave home for school without breakfast, she always feels ____  about you at home. She knows about your study and spends much money ____ your school things. Mother can do everything for you day after day. What ____  love that is in the world! We’ll always remember mother love.

将烧瓶内的水加热至沸腾后移去火焰，水会停止沸腾。迅速塞上瓶塞，把烧瓶倒置并向瓶底浇冷水(如图所示)，你会观察到烧瓶内的水又沸腾起来，产生这一现象的原因是(   )

写出画线部分发音不同的选项。

①____    A. but           B. put            C. us

②____    A. pot         B. old             C. job

③____    A. big         B. pig             C. fire

④____    A. he            B. she             C. well

⑤____    A. cake            B. hat              C. make