Chinese students find it difficult to understandnative speakers when in London—Exactly, ______ they’ve learned a lot about grammarand known many words

How often do you exerciseever. Because I am always very busy.

She would rather ________ the difficult situation in the new neighbourhood than move back.

Why not wear your miniskirt, Rose? — Well, my legs are too thick, if you ______ know.

Children in school are _________into grades according to how much they know. [ ]