A、Cloudy. B、Warm. C、Clear. D、Windy. C关键词题。女士提议去爬山，问男士今天的天气怎么样；男士说天空蔚蓝，而且没有云，这种天气最适合爬山了。由此可知，今天天气晴朗。transparently blue意为“蔚蓝的”。

W: Excuse me. I’m a new student. What am I supposed to do?
M: Well, first go to the Reception Desk and sign in; then you go to a classroom and do a test.
Q: What will the woman do first?

W: Let’s go climbing today, but what’s the weather like?
M: You mean the weather? Look! The sky is transparently blue and there is no cloud at all. I think it’s the best time for us to go climbing.
Q: What is the weather like today?