The scientific research on how to protect the rare animals is ________. Many scientists are working hard to find new way to raise the animals by man.

Anyway, I can’t cheat him---it’s against all my _______.

Your _____ as a student will be excellent if you develop a habit of reflecting on how you learn.

---Can you tell me why more and more people choose to shop in a supermarkets?
---Because it offers a great ______ of goods.

The key to our success was having the courage to take on any job, and then being creative in our _______ to getting it finished.

He carelessly dropped the ________ and broke it up.

We should develop the sunshine project actively, because it can save _______ resources as well as reduce pollution.

In order to increase the______ of the farm______, our government offers a lot of money to the peasants every year.   

She is only a (n) _________, not a friend of mine.
A. acquaintance  B . familiarity   C. announcement  D, family

Niagara Fall is a great tourist ________, drawing millions of visitors every year.