The dirty water in the river _____ many problems in the past ten years.
— Tom, where is the cake?— The cake? Haha, I just it.
–You’ve never been to Dalian, have you?--___. How I wish to go there again!
--- What do you think of my answer to the questions?--- Sorry. I _____ about something else.
I don’t think the film is wonderful. _______ , its ending is OK.
I like all the subjects ______ Maths.