Having taken our seats, ______.

A．the professor began the lecture

B．the lecture began in no time

C．we were attracted by the lecture immediately

D．the bell announced the beginning of the lecture

下列事件中，你认为必须找政府解决的是（）。

①上下班高峰期交通拥挤现象严重

②某企业对境外投资决策举棋不定

③某股票价格不断下跌

④某公司不按规定支付工人“国庆”期间的加班工资

A.①③

B.①②④

C.①③④

D.①④