Put __________ use in April 2000,the hotline was meant for residence reporting water and heating supply breakdowns.
The traditional goal of science is to discover how things are, not how they ought _____.
In their spare time, they will discuss the _____ to the study of English.
About _____ of the population of that country _____ on farms.
―Will you go to the Great Wall with us? ―If John wants to go, _______
I was so angry that I felt like _________ something at him.