A：①④
B：①③
C：①②
D：③④
The photo often makes the girl of the great time in the countryside.
打开盛有酒精的瓶盖，就能闻到酒精的气味，这是因为构成酒精的微粒____ 到空气中，接触到人的嗅觉细胞．白酒瓶一定要盖严瓶盖，否则酒的香味变淡，度数会降低，其原因____ ．
下列句子标点的运用恰当的一项是（ ）
—My math teacher said I was too lazy.—______________. You should work harder.
