Mr Smith is a European and his wife is an American 为什么第一个填a 第二个填an?

Mr.Smith is a smith 翻译 Mr.Smith is a __of Australia.(city) 同义句转换.Mr Smith is a good teacher.Mr Smith is（）（）（）. Mr .Smith is a good teacher同义句转换Mr .Smith is （ ）（ ）（ ） Mr.Smith is a f___________.He always palys a role. My name is John Smith.You can call me＿＿＿.A.Mr.John B.Mr.Smith C.Mr.Smith John D.Mr Mr Smith is taking a walk .改一般疑问句 Mr Smith is (a Maths teacher) 对括号部分提问 Is that Mr.Smith?--Yes,he ______ a beard. Mr Smith ,it is a notice to the audience.意思 译成汉语 Mr Smith is a man of letters.译成汉语Mr Smith is a man of letters. The man is mr.smith. Mr.Smith is an engineer. Is he Mr.smith 改错 Mr Smith have a sonBOB,BOB'S uncle is the Smith family'S member Mr Smith is wearing a bule shirt today对a bule shirt 提问_______ ________ Mr Smith _______ today What is Mr Smith?What is Mr Smith= ( ) ( )Mr Smith( ) Mr Smith is busy now.He is writing a book同意句转换Mr Smith is _______ ________ a book now