Definition: to turn off a light, television, etc. by using a switch Level: B1
记得关掉电脑。
Remember to ___switch the computer ___off.
他们无法联系我，因为我的手机关机了。
They couldn't call me because my phone was ___switched ___off.
离开时请关灯。
Please ___switch ___off the lights when you leave.
