A
...上面的都走进了一个简单的误区
Could you ...并不是can you 的过去式,它其实就是较礼貌的语气,叫委婉说法.
所以C D首先就排除,其次 问天气正确用法是 how is the weather或 what is the weather like
所以,毫无疑问选A,懂没?