句子填空（共10小题，每小题1分，满分10分）
根据句子意思，从所给的15个词汇中选出合适的词或短语并用适当的形式填空。

challenge	be strict with	predict	a number of	attract
possess	optimistic	depend on	crime	uncertain
treat	consist of	delight	typical	pollute

Don’t ___________ me as a child. I’m already in my twenties.
--- Could you do me a favor?
--- It ____________ what it is.
I am ___________ about what to do next. Can you tell me about it?
--- Why does the lake smell terrible?
--- Because large quantities of water _________________.
We all hope that our teachers ________________ us so that we can learn more.
To our ___________, our class won the game very easily.
It is _____________ that we will have a much colder winter this year.
Pollution of the environment is one of the most ____________ we face today.
The main function of advertisements is ______________ customers to buy the goods.
It is simply a ___________ for us students to waste so much food and water.