Are you willing to live in an age _____ 4G technology will bring about an information revolution

She had just finished her homework ____ her mother asked her to practice playing the piano yesterday

Sometimes I cannot but wonder ______ that has made me feel differently from the others.[ ]

It’s a ____coincidence that the day before his retirement, my English teacher will have been teaching for a total of forty years.

The fog was so heavy this morning that drivers could hardly _______ the things just ten meters away from them.