1. Her wealth and reputation gave her (an) entree into upper-class circles.
    她的财富和声望使她得以进入上层社会.

2. He belongs to managerial class.
    他属于经理层。

3. How many students are there in Class Three?
    三班有多少学生?

4. How many boys are there in your class?
    你们班有几名男生?

5. How many girls are there in your class?
    你们班有几名女生?

6. His laughing sounded like the low cry of an animal. The wolf cried back.
    他的笑声听起来像是一只野兽的低嗥。那条狼也叫了起来，作为应答。

7. Heterosexual(异性之间的) spreading is low, but there is danger that the spread of AIDS from male(男性) IV-drug users to their female(女性) partners could increase the appearance of AIDS in the heterosexual population.
    异性之间传播可能性不大，但艾滋病从男性静脉注射吸毒者传播到他们的女性伴侣，则有可能提高异性恋者艾滋病的发病率。

8. However, most people with low iron reserves don't know they have a deficiency, because traditional methods of calculating the amount of iron in blood (by checking levels of the blood protein that transports oxygen) are not sufficient, Beard states.
    然而，比尔德指出，大多数铁离子储量低的人并未意识到自己缺铁，因为传统的检测血液中铁离子储量的方法——只检验血液中输送氧气的血蛋白的含量——是不够的。

9. He talked freely and intimately in a low, hesitating voice that was not unpleasant to hear.
    他以低沉迟缓的嗓音亲切而无拘束地娓娓而谈，

10. Do you have a physiology class on Tuesday afternoon?
    星期二下午你们有一节生理课吗？