One day, when Zhou Kai’s mother saw him ____ (head) towards the front door without a jacket on, she eyed him with____ (anxious). She asked him____ (put) on my jacket and he did ____ he was told.

         His mother always makes sure the family eat ____ . For example, they have fish four times a week. Zhou Kai very ____ (rare) gets colds but last week he had____  bad cold and a bit of a fever. How come? That’s____ he was stupid____  to play football in the rain. So you can see how crazy he is____  football.

化学小知识填空

①铁由____构成

②利用活性碳的____可以有效地除去冰箱异味

③催化剂的“一变两不变”中，其中一个不变是指催化剂的质量不变，还有一个不变是指催化剂的____

④取用一定量的液体，必需使用的两种玻璃仪器是____