In Britain today women ____ 44% of the workforce, and nearly half the mothers with children are in paid work.
---Where did you come across your old classmate Jane?---It was in the supermarket _______ she worked _______ I came across her.
However, at times this balance in nature is ______, resulting in a number of unforeseen effects.
Harry Potter is said _______ into over twelve languages by the end of last year.
Canada is a country ______many different nationalities as well as a country with foreign immigrants(移民) ______ most of its population.
Studies show that people are more______ to suffer from back problems if they always sit before computer screens for long hours.