The problem ________ this material can be used in our factory has been solved.
It is not profitable to provide bus services in districts where the population is widely _____.
There are usually at least two _____ of looking at every question.
The driver can adjust the heating in winter and the air conditioning in summer to suit his own _____.
There is not much time left; So I'll tell you about it _____.
She got married although her parents had not given her their _____.