We did a survey (调查) about students’ activities. There are 2,000 students in No. 2 Middle School. Here are the results.
The survey of activities in No. 2 Middle School
Activities 
Every day Once or twice a week Three or four times a week
Watching TV 70% 10% 
20%
Surfing the Internet 15% 50% 35%
Doing their homework 90% 2% 8%
Doing exercises 20% 10% 70%
( ) 1. ______ of the students in No. 2 Middle School watch TV once or twice a week.
A. 10% B. 15% C. 20% D. 80%
( ) 2. There are 1,800 students ______ in No. 2 Middle School every day.
A. watching TV
B. surfing the Internet
C. doing their homework
D. doing exercises
( ) 3. 40 students in No. 2 Middle School do their homework ______.
A. every day
B. on weekdays
C. three or four times a week
D. once or twice a week
( ) 4. How many students do exercises every day according to (根据) the passage?
A. 400. B. 200. C. 1,940. D. 1,800.
( ) 5. From the chart we can know that ______.
A. there are 1,800 students in No. 2 Middle School
B. 400 students in No. 2 Middle School watch TV every day
C. 20 students in No. 2 Middle School do exercises every day
D. 200 students in No. 2 Middle School do exercises once or twice a week