读“俄罗斯地图”，完成下列填空：

A____________区；B____________区；C____________区；D____________区。

（2）填河、湖名称

①_________湖；②_________河。

（3）填港口名称

③___________，它位于_______沿岸；④________，它位于_______沿岸。

We are deeply impressed by the goal from the conference        the average income will double by the year 2020.

A．that

B．which

C．what

D．whose