Is it only when you fail _________ you will be awareof your mistakes

He hid himself behind the door _____ he still could see what would happen to his classmates.

He was really_______ in the _______story book.

You’d better let each student read his own tastes and choices.

The 18 college students in Fudan University should show their greatest respect to their hero — Zhang Ninghai instead of being cold and unfeeling