I ____think it ____ _____ ____ _____ tonight.

填
don't
will rain

哦,有5个空呢
那可以这样填
I do think it will not be rain tonight.

I do think...这样的语气表示对自己的判断更有信念.

I don't think it is going to rain tonight

I don't think it will to be rain tonight

will to be 楼上的太搞笑了
回去先念两年书再出来混吧
我的答案是：
I don't think it is going to rain tonight

我已修改了答案：

这个语法正确，但不符合本题：I don't think it will be rainy(注意这个是形容词,不用rain） tonight.
这个可以：I don't think it is going to rain tonight.