.Although we hadn’t seen each other for twenty years, I recognized him______I saw him.
—What do you think of his opinion?—None has given me ___________ piece of advice.
The boy should be punished. You shouldn’t let him ______ cheating in the exam.
You can only be sure of _____ you have at present;you cannot be sure of something _____ you might get in the future.
The company was named Gates Hall ______ a man named James Gates.
— Has Mary finished writing her article?— No, and it _____ before class was over.