1.\x05Does it often rain in your hometown?Yes,it is （rainy）

1.x05Does it often rain in your hometown?Yes,it is （rainy） all of the time.
2.x05It isn’t raining now.But it’s often （rainy） here in spring.
3.x05It often rains in spring in wuxi.But it’s （sunny） today.
4.x05Does it often rain in your hometown?Yes,it （rains） most of the time.
5.x05Does it often snow in winter here?Yes,there is a lot of （snow） in winter here.
为什么1-3例句中括号里的词用的是形容词,而4-5句只需一般现在时,尤其是1和4,看上去差不多,