---Remember this, children. ____careful you are,____mistakes you will make.---We know,Mr. Li.
Thank you for giving me __________.
Chinese is used ______ the largest number of people in the world.
The woman has something wrong with her eyes and has to have them _________.
Our friends were _______ busy ______ with each other _______the time.
---He has ______ little education that he can’t teach _______ little children.