Since the start of COVID-19，many people have been stuck（困住的） indoors.Online classes and working from home mean sitting around a lot.
   We already know that if we don't move much，we get fatter，we get heart problems and maybe we get diabetes（糖尿病）.But new studies have shown that it could be bad for our mind，too.
   A study of 937 American adults during COVID-19 found that about one-third of them sat around for more than 10 hours per day.It reported that people who sat for too long often showed more symptoms of depression（抑郁的癥狀）.
   Another study studied children aged 12，14 and 16.It found that the longer they sat，the higher depression scores they would get by age 18.According to the study，if eighteen-year-old children sat too often，they had depression scores 28 percent higher than those who were more active.
   Scientists are not sure yet about the connection between too much sitting and depression.But an expert named Mats Hallgren said， "sitting for too long can slow blood flow（流動(dòng)） in the body including blood flow to the brain.It might also influence the growth of neurons（神經(jīng)細(xì)胞） in the brain.And couch  potatoes might do other unhealthy things while sitting on the sofa，such as eating on junk food.All these may lead to depression."
   Is there any good news？It's easy to deal with the problem.Aaron Kandola from University College London，UK，said "all kinds" of movement might help，even light activity.
   "It is great to exercise and play sports，" said Kandola. "But anything you can do to avoid sitting for too long will help with mood（情緒），stress and thinking clearly." The key message is just to move more，more often.

（1）What will probably happen if we don't move much？

A

A

A．We will become heavier.
B．We will be healthier.
C．We will feel relaxed.
（2）According to the study，

B

B

American adults sat around for more than 10 hours a day during COVID-19.
A．a(chǎn)bout 200
B．About 300
C．About 500
（3）What might "couch potatoes" mean in paragraph 5？

C

C

A．沙發(fā)上的土豆
B．血液流動(dòng)迅速的人
C．坐在沙發(fā)上懶得動(dòng)的人
（4）What can we learn from the passage？

B

B

A．Sitting for too long is good for teenagers' health.
B．More exercise might make people happy and think clearly.
C．It's difficult to solve the problems caused by sitting for too long.
（5）What's the purpose（目的） of the text？

A

A

A．To encourage people to move more often.
B．To introduce the symptoms of depression.
C．To explain the reason why people sit too often.