—The air is full of smoke and people are coughing.—It will get worse________the government does something about the pollution.
The picture ________ on the wall is painted by my nephew.
The managers discussed the plan that they would like to see _______the next year.
how to do the homework, I went to ask my teacher for help.
You’d better leave the windows _________ and the door ___________.
We should spend as much time as we _______ over our lessons.