–What do you think of Black Coal, Thin Ice?–It’s a good film.     , it is not suitable for teenagers.

—How often does the programme Xiuhuliaozhai come out on YWTV? —It comes out every Saturday, it’s a ________ programme. 

Alan is a careful driver, but he drives _________ of my friends.

Math is boring and       difficult.

I can't see the words           .  on the blackboard. Please turn on the light.