题目

Unless something can be done,great areas of urban network will disappear under the waves.It will take a great engineering effort to protect these cities— an effort that may be beyond economies that have been brought to their knees.
an effort that may be beyond economies that have been brought to their knees.
an effort that may be beyond economies that have been brought to their knees by climate change.

提问时间：2021-09-17

答案

除非我们设法做点什么,否则绝大部分的乡村将被巨浪所吞没.
要保护这些城市需要实施极大的工程量——如此巨大的工程量可能远远超过以气候变化为代价所带来的经济发展.