根据括号中的提示,用定语从句完成下列各句：
1.A student _________________will earn respect from otherstudents.(you have to work hard and achieve high grades in exams)
2.you may look up a dictionary _________________ when learning new words from english articles.(the dictionary has Chinese defintions for english words.)
3.the policeman__________was my uncle.(i greeted a policeman just now.)
4.the school tennis club __________________meet and hold a match every week.(the members of the school tennisclub are all tennis fans.
5.mr yang liwei's trip to outer space has realized the dream________
(the Chinese people had a dream to outer space for years.)