_____ the chapter four times, I finally understood the author's theory.
It just isn’t fair. _____ I was working as a waiter last month, my friends were lying on the beach.
_____ admission rate up by 60%, the school has had another excellent year.
China has been pushing the reform of public hospitals ____ all its citizens.
I never know how colorful my life would be until I ____ my first college teacher last term.
Sir, you _______ be sitting in this sitting room. It is for women and children only.