问题

Global warming has become a serious problem, ______ we must find solutions.

A:which
B:to which
C:with which
D:that;

正确答案是：

同类题型

Is your uncle really very ill—______. He’s in hospital.

The government _________ the diplomatic (外交的) note from that country forits unclearattitudeto the trade between two countries.

he help of the collected money, subwayscan be built sooner and better, _______ brings convenience to citizens

下列句中加点实词意思相同的一项（）

_______ progress it is, you can’t stop moving forward