1 . It is said that Yoga is of great b ______to our health.

2 . It was so________(勇敢的) of you to speak in front of all those people.

3 . Jiesang was killed in the ________ (战斗) against the poachers. (根据汉语提示单词拼写)

4 . 用所给词组的适当形式完成下列句子（有两个词组是多余的）

be concerned about, on the brink of , feed on , show off, be aware of , cheer ... up , put one’s foot in one’s mouth

1. Esther is so outspoken that she always ________when chatting with others.
2. When I got ill, my mother ________me and asked me to take medicine on time.
3. Today an increasing number of wild animals are ________extinction.
4. She usually ________her best friends when they are in low spirit.
5. Have you ________your mistake at work ?

5 . When we________(呼吸),the air goes into our lungs. (根据汉语提示单词拼写)

6 . Tom was absent. That was_______he was ill.
Tom旷课了。那是因为他病了。

7 . Do you think it is _________(有益的)to human beings?

8 . China is a nation_____________(属于) to the third nation.

9 . When a person is ___________(咬)by an animal, we should do wash the wound with the cold running water before he is taken him to see a doctor.

10 . ____________(简单地) speaking, I’m in support of your idea.