---____ do you exercise, Miss Lin? ---Once a week.
---Could I use your dictionary to look up some new words ? ---OK, ________.
---Do you mind my listening to the music? ---____. The boy is sleeping.
The old scientist devoted all her time she had ____ the western parts of China.
---I haven’t seen Lucy for three days. Is she ill? ---______. Her sister told me she was in hospital.
We don’t believe _____ little children can do ____ much work in such a short time.