Jack is English.He is an English boy.为什么第一个English不用冠词?

Jack is English.He is an English boy.为什么第一个English不用冠词? How old is Jack?I think_____(he is)12.填空 is he jack? Is he Jack? I,Tom,he am Jack is,and,.连词成句 Jack is an English boy. This letter is .jack jack' he He is teaching me English.I ( ) ( ) English ( )him. hello,my name_____Jim.He is an English boy.his _____is Jack Brown.he____eight.I_____eight,too 句子改写1.Mike is 15 years old.Jack is,too.Mike is the __________ __________as Jack.2.I’m not so good at English as jack.Jack __________ __________than me in English. He is n___ Jack.He is Tom. He is jack,my brothers. He is w ____ Jack he is a jack-leg I guess______name is peter,he is an English boy . This is my family （）This boy is me .（）is Bob .I am eleven.I am in No.8 Middle School.This is my father .() name is Jack Smith .He is a teacher in my school .He is() English teacher .And this is my mother,she is a (),too.()that man next to my 1.I think Jack's restaurant ___ the best service A is B are C has D have 2.He teaches himsel1.I think Jack's restaurant ___ the best serviceA is B are C has D have2.He teaches himself English ___ the radioA at B in C with D on3.The man looked at me w 把下列句子改写成一般疑问句并分别做出肯定和否定回答They are wearing yellow shirts.I am planting the tree.He is reading English.We are having some bread.Jack is watching a film.