Talking with foreigners is a useful way to ____ /ɪm'pru:v/ our English.
Lucy knew nothing about it ___________ her sister told her.
He can play tennis better than ___________ in the class.
The old man lives ___________ , but he never feels ___________.
—Do you know mother giant pandas have only one or two babies ___________? — Sorry, I don’t know.
— Is this maths problem ___________? — Yes, I can work it out ___________.