题目

如图，在矩形ABCD中，∠ADC的平分线交BC于点E、交AB的延长线于点F，G是EF的中点，连接AG、CG．                                             （1）求证：BE=BF；                                                                          （2）请判断△AGC的形状，并说明理由．                                                                                  �—I met your uncle on my way to school this morning.—Ah? You _____ be joking. He flew to Germany yesterday evening!A. might B. should C. could D. must