A boy and a girl were playing together. The boy had a lot of small glass 1. The girl had some candies with her. The boy told the girl that he would2her all his balls in exchange for (交换) her candies. The girl thought that was a good3.

    But the boy didn't give4of his balls to the girl. He kept the biggest and the5ball in his pocket and gave the others to the girl. 6the girl gave him all her candies.

    That night, the girl had a 7sleep, but the boy didn't sleep well. He kept thinking whether the girl had 8some candies from him.

    You think in the way you do things. If you don' t give your hundred percent(百分之百) in a relationship, you'll 9 keep thinking if the other person has given his or her hundred percent. This is true for any relationship.

    Give your hundred percent to everything you do and you'll find that you can always10a lot of happiness.

为了探究温度、pH对酶活性的影响，下列实验设计合理的是（　　）

对漫画《以跳治暴》理解有误的是
 

PM 2.5是指大气中直径小于或等于0.0000025m的颗粒物，将0.0000025用科学记数法表示为____．

阅读理解，根据课文信息，写出括号内单词的正确形式。

Dear Amy,

    My name is Zhang Yuxiao. I'm a pupil. I ____（go） to the park last Sunday. I ____（see） some birds. They ____（sing） beautifully. I ____（eat）some food and ____（drink） some colas.  It was fun. I had a good time last Sunday.