When you ______ the book please return it to the library on time.
It’sgood feeling for people to admire the Shanghai World Expo that gives them pleasure.
---Do you know if Helen is willing to take charge of the project? --- , does it?
Later in this chapter cases will be introduced to readers __ consumer complaints have resulted in changes in the law.
Animals suffered at the hands of Man ___ they were destroyed by people to make way for agricultural had to provide food for more people.
Jack is late again. It is ___ of him to keep others waiting.