---Whose(谁的) is the ruler?---It’s not_______. It’s ________.
---What do you often do _______ your free time ? --- I often read. I read __________ interesting books .
Don’t ___________ about things so much. It will make you stressed out.
I always go to sleep ___________ the light on.
It ___________ that he has been ill for a long time.
He is afraid of ___________ strangers.