Sixteen-years-olds shouldn’t ______ to go to an Internet bar.
The young man used to _____to work, but he is used to ______to work now.
---Please turn off the light. ---OK, Mom. I won’t leave the room _____ the light _____.
--- He went to see the man who was in hospital yesterday. --- ____________.
_he tried many times, he still couldn’t move the heavy box.
My father wants to give up_, but it’s hard for him to_.