A：人类的生产和生活活动
B：全球的气候变化和自然灾害
C：地壳变动和海平面升降
— Have you seen the film called The trouble with Teenagers?
—Yes, but I don't think it is worth _______.
现在了解天气预报的途径有：____、____、____、____、____、____、____等。
