I can’t say I’m the best. I have only ______ made more efforts than others.

However, they can hardly blame me; it is ________ their own fault.

The Internet has brought _____ big changes in the way we work．

The charity sale our school organizes every year has taught us much. _______ we would never have learned it in class.

I’m sorry that what I said just now has hurt you, but I didn’t do it _____.