C3 Daniel and Millie are chatting online about Harbin. Complete their conversation with the words in brackets.
Daniel: Have you been to Harbin, Millie?
Millie: No, I haven't. ⁽¹⁾ (in winter/
very cold there/it's). 😣 ⁽²⁾
($-40° C$/the lowest temperature/can be/it's said that).
Daniel: That's true. I travelled there with my parents during the winter
holiday. It was really cold outside, but there's a heating system inside
almost every building, so ⁽³⁾
(to stay inside/comfortable/it's). 😊
Millie: That sounds nice. What did you do there?
Daniel: We went to the Harbin International Ice and Snow Sculpture Festival.
⁽⁴⁾
(fun/so many/to see/it was/beautiful things made of ice).
Millie: That must be interesting! I'd like to go there with my parents next
year. ⁽⁵⁾
(to fly/how long/from Beijing to Harbin/does it take)?
Daniel: About two hours. ⁽⁶⁾
(comfortable/to/it/all think/my parents and I/travel by plane).
Millie: I agree. ⁽⁷⁾
(it's/to go/much faster/by plane). I'll ask you more about Harbin later.
Daniel: No problem.

(1) It's very cold there in winter.
(2) It's said that the lowest temperature can be -40°C.
(3) It's comfortable to stay inside.
(4) It was fun to see so many beautiful things made of ice.
(5) How long does it take to fly from Beijing to Harbin?
(6) My parents and I all think it's comfortable to travel by plane.
(7) It's much faster to go by plane.

本题考查it的相关句型运用，包括it作形式主语的"It's + 形容词/名词 + to do sth."、"It's said that..."结构，以及it作形式宾语的"主语 + think + it + 形容词 + to do sth."结构，需结合语境将括号内词汇组合成符合语法和句意的句子。