2.小明吃過餅干后忘記密封，幾天后他發(fā)現(xiàn)剩下的餅干變軟了，這說明空氣中含有　　

　A.氧氣　      B.二氧化碳　   C.氮氣　     D.水蒸氣

1.物質(zhì)常發(fā)生下列變化：①揮發(fā)；②燃燒；③熔化；④發(fā)光；⑤銹蝕；⑥腐爛。

其中一定屬于化學(xué)變化的是　　　

　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)寫出同義句

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”.