1. (2020九下·襄州月考) 听材料，回答问题。

What are you doing, Mark?<br />I'm doing a survey about the student's housework at home.<br />What's your result?<br />There are fifty students in my class.<br />Only a half helped to do housework at home.<br />Twenty percent of us watch TV at home.<br />Thirty percent of us do the homework.<br />What about you?<br />I usually helps to take out the rubbish and sweep the floor at home.<br />I also do some housework.<br />I usually help my mother do the dishes.<br />It's right for us to help do some housework.<br />You're right.<br />What are you doing, Mark?<br />I'm doing a survey about the student's housework at home.<br />What's your result?<br />There are fifty students in my class.<br />Only a half helped to do housework at home.<br />Twenty percent of us watch TV at home.<br />Thirty percent of us do the homework.<br />What about you?<br />I usually helps to take out the rubbish and sweep the floor at home.<br />I also do some housework.<br />I usually help my mother do the dishes.<br />It's right for us to help do some housework.<br />You're right.

1. （1） How many students do housework at home in Mark's class?

   A . 10. B . 20. C . 25.
3. （2） How many percent of the students watch TV at home?

   A . 20%. B . 30%. C . 40%.
5. （3） What housework does the girl usually do at home?

   A . Sweeps the floor. B . Does the dishes. C . Takes out the rubbish.