题目

情境及首字母提示填入适当的单词，使短文句意完整、通顺。 Pen pal wanted His name is Wang Lei. He is a （61）C    boy. He wants a pen pal in （62） F   . He thinks it's a very （63）i   country and he wants to learn some French. He （64）l      in Beijing, China with his parents now. He is 14 (65)y       old and his (66)b    is in November. He can speak Chinese and a little English. What are his (67)l           ? He likes watching sports games on TV and (68)p            computer games with his friends. His favorite 15．如图，已知四边形ABCD中，∠A=90°，AD∥BC．（1）请你补充一个条件，使△ABD∽△DCB，并证明你补充的条件符合要求；（2）在（1）的条件下，如果AD=6，BD=4$\sqrt{3}$，求DC的长．