The time he has devoted in the past years _____________ the disabled is now thought to be ________ great value __________ him.
As a doctor, you can’t be ________ careful.
--- Tom, would you please not make so loud noise? Dad is sleeping. ---- _________, mom.
---Why is the woman crying there? ---Because she is ______. Her only son is lost and no one can help find him now.
Tom, ______ too much TV.
Here comes the bus. Let’s .