A)There's been nothing but rain for quite some time.
B)He's bored with the changing weather.
C)He thinks that it'll rain for three weeks.
D)He's bored about the topic on weather.
原文：
W: I can't believe it's raining again.
M: Three weeks without a change is pretty boring.
Q: What does the man mean?
M所谓的three weeks without a change 是指天气三个星期没有变化，再结合W的话：it's raining again，(又下雨了），可知三个星期来一直下雨。