短文改错（共10题；每小题1分，满分10分）

After supper Li Hua came and asked me go           小题1:     

and see a film with him. In our way to              小题2:     

the cinema we saw the little girl sitting by            小题3:     

the roadside cry. We bought her a cake to                  小题4:     

stop her crying. But when we asked where she        小题5:    

had lived , she said she did not know . So           小题6:     

when we took her to the police station and           小题7:     

asked the police to take care for her . After           小题8:    

this we went to the cinema, But when we            小题9:     

got there the movie was near at its end.              小题10:     

Though we missed the movie , we did a good deed.

We felt very happy.

（5分）下图所示A~G是初中化学常见的物质。图中“→”表示转化关系，“—”表示相互能反应。已知A是人体胃液中含有的酸，G是最轻的气体，B和C含有相同的元素。

（1）写出F的化学式                       ，E物质的一种用途                          ，C物质的一条化学性质                                       ；

（2）C和D反应需要高温，写出它们反应的化学方程式                               ；

（3）A→B反应的化学方程式是                                              。