根据句意,用括号内所给的适当形式填空。 小题1:Look at ____________ (you) in the mirror. How dirty your faces are! 小题2:It’s surely the __________ (tough) experience in his life that the brave young man has had. 小题3:Seven ____________ (twelve) of the students in our school are boys. 小题4:All of them want to know how the matter is ____________ (progress) at the moment.