27.After the bell rings, which indicates the ending of the exam, you ______stay where you are until all your papers are collected.
_______ with her sister, Mary is even more hardworking and better at her lessons.
Most of the people attending the meeting are not _______ the project, for it costs too much.
In some places, women earn money ________ men work at home and raise their children.
Though John and David are twins, yet they differ widely _______ character.
Great changes ________ in the village in the past two years.