These product are very cheap because the industry___the raw materials,the prices of which remain low
“She's not a dancing teacher, is she?”“_____.”
“What did he ask you?”“_____ I would be late.”
They kept trying _____ they must have known it was hopeless.
“I think the teacher is wrong, _____?”“No, I don't think so.”
“Is there _____ here?”“No, Bob and Tim have asked for leave.”