.After studying chemistry for years, I can only say I have____general knowledge of this subject.
—You have set aside more time to play with our kids.—I wish I ______, but you know how busy I was.
The carpet really wants ______. I’ve spilt coffee all over it.
Action must be taken to prevent that factory from ______ heavy smoke into the air.
— Can you see what is written on that board?— Yes. It _______ “CAUTION: WET FLOOR”.
Could you tell us ______ happens when one student in class expresses a personal opinion _______ maybe upsets other students?