—What do you think of Beihai?—It’s great. ______ air is so fresh.
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 _ .