The book was so interesting that he read it for four hours _______ he realized it.

ughter, job requires her to do a lot of travelling, is always away from home.

ou go by train, please see to it_______ you takean express, _______ that stops only at big stations

ller would sell the shirt for tenyuan, but the customer ________ eight yuan

_____ most of these languages are now threatened and may disappear is a serious matter to the people in Britain.