I don’t know _____ these old clothes
How about _________out for a walk, mum?
Try to sing more English songs,and you will find it interesting_______ a foreign language.
Mr Zhang encourages the poor students ______ study.
---I can’t stop playing computer games. --For your eyes,my boy,I’m afraid you______.
People who eat a balanced diet should be healthier than those who only eat biscuits and hamburgers, ______?