正常语序的话是what's the weather like ? 和 how is the weather?
所以改成疑问句你就应该知道为什么了
A 改为however the weather is 就对了 ,明白? like 后面要有宾语的 whatever可以充当 however却不能
把A改成however the weekend it is like
其实应该选A翻译过来就是这周去…怎么样?B言语不通
What is the weather like?
和 How's the weather?
都是:天气怎样?
你可以比较下,应该很容易看出来他们的区别了吧。