2.小明吃过饼干后忘记密封，几天后他发现剩下的饼干变软了，这说明空气中含有　　

　A.氧气　      B.二氧化碳　   C.氮气　     D.水蒸气

1.物质常发生下列变化：①挥发；②燃烧；③熔化；④发光；⑤锈蚀；⑥腐烂。

其中一定属于化学变化的是　　　

　A.①②③　  　B.③④⑥　     C.②⑤⑥　    D.①⑤⑥ 　

6.He is very healthy        He is                      

5.My sister said to me,“I’m going to help you.”  My sister      me            going to help        

(B)写出同义句

4.She said,“I go to school every Monday.”                                            

3.The teacher said“The moon moves around the earth.”                                       

2.He said to me,“I will call you tomorrow.”  He       me            call    the next day.

1.      Lana said,“I’m mad at Marcia”.