Dear friends， do you still remember ____ three years ago？
To realize our dream!（ ）
| A． |
why you came here |
| B． |
why did you come here |
| C． |
how you came here |
| D． |
how did you came here |
相关试题
如图为家鸽呼吸系统示意图，下列说法正确的是( )
| A．②和③都能进行气体交换 |
| B．家鸽的呼吸方式是双重呼吸 |
| C．①是器官②是肺③是气囊 |
| D．气体进入体内的途径是①→②→③ |
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