Clare has offered a _______ of $ 100 to anyone who can find her lost cell phone.
.At the meeting they discussed different ______ to the study of mathematics.
The children were warned of not being too _______ about things you are not supposed to know.
.It was difficult to guess what her _____ to the news would be.
Having been attacked by terrorists,________.
We must know what we should do and what we should avoid ______a good impression on others in public place.