2. 根据语境选词填空。 (1)The weather forecast says that it is going to ______ tonight. So it will be a _______ night and if you keep this basin of water outside, it will be ______. (freeze, frozen, freezing) (2)An ___________ is a building from which scientists can _______ the stars, the weather, etc. (observe, observatory) (3)On a _____ day, you have to drive slowly because heavy ___ makes it hard for drivers to see clearly. (fog, foggy)

freeze

freezing

frozen

observatory

observe

foggy

fog