Every day Mother sets about her housework ______ she returns from work. Which of the following is NOT OK?
I want to know _____.
Don't have your children _____ for hours reading books in _____ dark a room.
Liaocheng, Shandong Pro. is a beautiful city, ____11 pay a three-day visit.
The teachers are doing what they _____ their stuaits.
They were _____ inventors than pure scientists.