20．What will the man probably do？ A．Attend the concert after his exams are finished． B．Stay home to prepare for his exams． C．Go to the concert with the woman．
20．Stephen Hawking，who is the most famous physicist，was born in Britain on January 8th，1942．As a child，he was enthusiastic about （61）designing（design） complicated toys but （62）unfortunately（fortune），in his twenties，he suffered （63）froma disease that was impossible to be cured，（64）whichwas a great challenge for him．However，not only was he positive about the misfortunes （65）and eventually he defeated all the obstacles but also he was （66）absorbed（absorb） in his research in the universe．In 1988，his bestseller A Brief History of Time was published，（67）inwhich he put forward the idea （68）thattime itself has a beginning，and that it will have （69）an end．In conclusion，he has made outstanding （70）contributions（contribute） to the fields of cosmology and quantum gravity．
