It is no ________ pretending you did not know because everyone saw the whole accident.

Though she didn't come back to her hometown for many years，she could still________some scenes of childhood.

(2013·湖南高考)You cannot accept an opinion ______ to you unless it is based on facts.

 The factory produced many kinds of bikes, none of ___  __ shipped to foreign countries.

The aim of education is to teach young people to think for themselves and not follow others ______ .