完形填空。A: Hi!ZhaoMei!B: Hi!ZhangPing!Where
题型：完形填空
问题：
| 完形填空。 |
| A: Hi! Zhao Mei! B: Hi! Zhang Ping! Where are you 1 ? A: I'm 2 to the Zoo 3 Chen Jie. B: May I 4 with you? A: 5 . Let's go together. |
| ( ) 1.A. go ( ) 2.A. go ( ) 3.A. with ( ) 4.A. to go ( ) 5.A. Certainly | B. going B. going B. by B. going B. You can | C. to go C. walk C. and C. walk C. Yes | D. goes D. walking D. to D. go D. Go |
B+C+H2O;
B+D；
A+B+H2O。A、D是单质，常温下都是气体，由此可推断出A、B、C、D(写化学式)为：A_____________.，B______________.，C_______________.，D._________。写出①的化学方程式，并标明电子转移的方向和数目：__________________。