_____________________________ (他疲惫不堪) and didn’t want to say a single word.

A．Cooler and drier.
B．Cooler and rainier.
C．Warmer and drier.
D．Warmer and rainier.

A．People in some developing countries have realized that the world’s resources are limited.
B．People in developed countries do not care much about common properly.
C．Laws have to be passed to protect natural resources.
D．Developing countries are short of resources.