27. ---I don’t suppose she could have done well in the exam last week,_____ she? ---_____, she almost failed to pass the exam.
183. This plan will help to _______ two birds with one stone.
182. In the time of great trouble, the soldiers _______ their spirits by singing.
181. The old man told us most of the story, but _______ the part about the murder.
180. The monkey came down and _______ onto the elephants back.
179. Please don’t _____ a joke on the disable. We should try our best to help them.