The young man used to _______ to work,but he is used to _______to work now.
--_____ you call back tomorrow? --Of course I can.
Our teacher often tells us ____ the windows before we leave.
I _____ my homework at home yesterday.
Does Zhao Ping ___ his father or his mother?
Some of the volunteers hope to continue ________ in the village after_______ some time with the villagers.