It is cold in this room??

请问：该句当中的“句子成分”是不是：
1.主语——“room”
2.系动词——“is”
3.表语——“cold”
4.定语——“this”

还是：1.主语——“it”（用于代指“天气”)
2.系动词——is
3.表语——cold
4.地点状语——in this room(用于修饰“全句”）

It is very cold in the late Autumn . --------it be cold this weedend? "It‘s cold in this room.” “______the heating?" (2 分) There is too much noise in this street. , it attracts is this it ? ( )3.-What’s this in English?A. This is a bag B. It is bag. C. It’s a bag. it`s so cold in here??????? 翻译不冷不热：It is .......cold ......hot is it in the factory____ you visited last week ____t this kind of car is made The project is designed in this way and once____,nothing can be done to change it.