After he worked out the solution,appeared a smile on his fac

After he worked out the solution,appeared a smile on his fac 英语翻译1.He came into the classroom with a big smile on his fac A big smile appeared on his face. A smile appeared on her face是主系表吗 He took big bites ,and then a huge smile came across his fac a smile appeared on his face这里appear为什么要用过去式? his head soon appeared out of the window from where he could he hung up the telephone,with a smile on his face He must have a very---holiday.you can see the--smile on his i could tell he was surprised from the expression on his fac I worked on the problem ____ a long time and I worked it out I worked on the problem for a long time and I worked it out