() 1. Sam does ______ in his studies this year than last year.
A.well
B.better
C.best
D.the best

B

题干中有关键词“than”，表示是比较级，所以要用比较级的形式“better”。A选项为原级，C、D选项为最高级，均不符合题意。

() 2. —Is Julie as tall as you?
—No, she isn't. She's ______ than me.

A.tall
B.taller
C.tallest
D.the tallest

B

由答句中的"than"可知，此处应用形容词比较级。tall的比较级是taller，故选B。

( ) 3. Protecting animals is as as protecting ourselves.
A.important
B.more important
C.the most important
D.most important

A

题干中“as...as”意为“和……一样”，表示同级的比较，中间应用形容词或副词的原级形式。A选项“important”是形容词原级；B选项“more important”是比较级；C选项“the most important”是最高级；D选项“most important”表达错误。“Protecting animals is as ______ as protecting ourselves.”表示“保护动物和保护我们自己一样重要”，要用形容词原级，所以选A。

( ) 4. you practise, ______ you will be at maths.
A.The more; the better
B.The more; the best
C.The most; the better
D.The most; the best

A

“the+比较级，the+比较级”表示“越……，越……”。“more”是“many/much”的比较级，“better”是“good/well”的比较级，符合语法结构。A选项正确。

Ⅱ. 根据句意,用括号中所给词的适当形式填空
1. It's reported that the Fuxing high - speed train can go as as 400 km an hour. (fast)
2. I think Tom did well, but Jack did than him. (well)
3. I have books than you. (many)
4. Please read so that others can study. (quietly)
5. Which subject is for you, English or Chinese? (difficult)

1. fast；2. better；3. more；4. quietly；5. more difficult

1. "as+形容词/副词原级+as"为固定结构，此处修饰动词go，用副词fast原级。
2. 由than可知用比较级，well的比较级为better。
3. 由than可知用比较级，many的比较级为more。
4. 此处修饰动词read，用副词quietly原级。
5. 两者比较用比较级，difficult的比较级为more difficult。

探究点 population 的用法
population 名词,意为“人口”。

| population 作主语时,谓语动词用单数形式 | The population of this city is growing rapidly. 这座城市的人口正在快速增长。 |
| population 前有分数或百分数修饰时,谓语动词用单数形式、复数形式均可 | 20 percent of the city's population are/is from China. 那个城市 20% 的人口来自中国。 |
| 询问“人口是多少”有两种方式：What's the population of...? 和 How large is the population of...? | What's the population of China? = How large is the population of China? 中国的人口是多少？ |
| 表示人口“多”或“少”要用 large/big 或 small 来修饰 | Our town has a small population. 我们镇人口少。 |
情境应用
1. In the town, 70 percent of the population Chinese. (be)
2. — the population of the city? (be)
—The city has a population of about 100,000.
3. The population of China is than that of America. (big)

1. are/is
2. What's
3. bigger

1. 根据题意和表格提示，当population前有分数或百分数修饰时，谓语动词可以用单数或复数形式。因此，70 percent of the population 可以与are或is连用。由于主语是复数概念（70%的人口），更倾向于复数形式。
2. 询问人口多少的标准句型是What's the population of...? 或 How large is the population of...? 因此，这里应填What's。
3. 根据题意，中国的人口比美国的人口多。表示人口多少时，用large或big修饰。由于是比较级，应填bigger。