This year the company has produced as many cars as the year before last, but the total profits are four-fifths ______ they were then.

(2013·杭州学军中学高三质检)—I said hello to you in the street yesterday，but you________me completely.—I’m sorry.Maybe I didn’t notice you.

Teenagers ______ social experience, so they are easily ______   when they first step into society.

—Which module is the most difficult in this book?— I think _____ module.

(2013·南平一模)Adopting the doctor's advice, he ________ coffee and cigarettes and ate a balanced diet.