The blackboard is _______ the wall(墙). It is_________ in the wall.A. on, not B. on, / C. in, no
- _______ your father at home now?-Yes, he is. He_______ TV.
Did you find the answer the question about TV very interesting?
—What about_______ a rest? —OK!Let’s go for a walk.
Peter is my best friend. He often helps___ science.
—I can’t find my CDs. —_______you put them in that bag.