题目内容
He really likes English and often ______ English after class.
A. practice speak B. practices speak
C. practices speaking D. practice speaking
C
【解析】
试题分析：句意：他真喜欢英语，并且经常在放学后说英语。and连接的是两个并列的谓语动词,所以动词应该用单数，故排除AD；practice+doing sth练习做某事。故选C。
考点：考查动词时态及动词短语。
We often read the Air Quality Index（空气质量指标）or AQI reported in the newspaper. The AQI helps us understand what the air quality around us means to our health. The AQI uses colors, numbers and words to tell us about the air. Let’s see what these colors and numbers mean.
AQI colors | AQI Numbers | Health word(s) | What to do |
Green | 0-50 | Good | Just enjoy the clean air! |
Yellow | 51-100 | Moderate (适中) | Air quality is fine for most people. |
Orange |
101-150 | Unhealthy for sensitive(敏感的) groups | Active children and adults and people with lung(肺) disease should spend less time outdoors |
Red |
151-200 |
Unhealthy | People with lung disease and active kids and adults shouldn’t spend too long time outdoors. Everybody else should try to spend less time outside. |
Purple |
201-300 | Very unhealthy | People with lung disease and active kids and adults should not spend any time outdoors. Everybody should try not to go outside. |
1.If the weather report says today’s AQI is 39, we can ________.
A. enjoy the clean air B. spend less time outside
C. try not to go outside D. stay inside most time
2.If the Air Quality Index is ______, the air quality is good for most people.
A. orange B. red C. purple D. yellow
3.The _______ AQI numbers are, the _______ air quality is.
A. bigger; better B. bigger; nicer C. smaller; better D. smaller; worse
4.We use ________ to tell about the quality of the air .
① color ②words ③weather ④numbers
A. ①②③④ B. ①②③ C. ①②④ D. ②③④
5.Which of the following is TRUE?
A. If the AQI number is 140, the AQI colour will be red.
B. If the AQI colour is purple, the air is the best for people.
C. People with lung disease 
are very sensitive to the air.
D. The AQI can’t help people know the air quality.