在“探究平面镜成像的特点”的实验中：

（1）我们不直接用平面镜用一块玻璃板代替竖直放置在桌面上，这样做的原因是：______．

（2）用白纸放在乡的所在的位置时，在白纸上没有蜡烛的像，说明平面镜成的像是______像．

（3）在玻璃板的同一侧．该同学通过玻璃板看到了同一蜡烛的两个像，产生这种现象原因是______．

      that he was praised by his teachers.

A．So great progress had he made

B．So great progress he had made

C．Such a great progress had he made

D．Such great progress had he made