It is clear that no use can be made ______radium _____we don’t know clearly the characteristics of it.
Cleaning women in big cities get by the hour.
She felt rather _______that she should drive the car at such a___________ speed.
The teacher asked us __________ so much noise.
— He said, “ Light travels much faster than sound.” — He said that light _______ much faster than sound.
—What did he say? —I don’t know what________.