It’s generous ________ them to give food and clothes to homeless people. They think it important________ them to provide places for homeless people to stay.
You’d better ________. It’s bad for your eyes.
It’s difficult ______ this work today.
He speaks English ______ than any other student in his class.
If it ____ tomorrow, we will have a picnic in the park.
Don’t forget _____ the door when you leave.