Is it ______ UFO in the sky填什么?this is______orange ball 填什么?

Is it ______ UFO in the sky填什么?this is______orange ball 填什么? What's this in English?回答?有3个选择：1.It is the UFO.2.It is a UFO.3.It is an UFO. — What's 联合国 in English?— It's ______.[— What's 联合国 in English?— It's ______.[ ]A.CCTV B.UFO C.BBC D.UN In ______ winter it is cold in ______ BeijingandIn ______ winter it is cold in ______ Beijingand warm in ________Shanghai 怎么答?为什么 In shanghai it is ______ in springIn beijing it is _________in autumn -______?-yes,it is. a.what isthis in english. b.is it a comuter In Harbin it is ______ ______ in winter,急!In Nanjing it is ________ _________ in summerIn Shanghai it is ________ in springIn Beijing it is _________ in autumn They saw a UFO flying in the sky.(改为被动句）A UFO ______ ______ ______in the sky. Kim,______ is that in your hand Oh,it is my________.Is this your father?. Where is jinan?It's in ______ Where is toronto Where is jinan?It's in ______Where is toronto It's in . It is ______,I think you left it.A.where B.in which It is the longest word in the world保持愿意It is_____than_____ ______ ______in the world Our ciassrooms is big and clean,so it's ______(comfort) to study in it It is a boring film,so we are not ______(interest) in it. There is little water in the bottle,______? isn't there is there isn't it is it It is difficult to finish all my homework in the eveng(改为同义句）It is ______ ______ to finish all my homework in the evening It is sunny day 同义句It is ______ ______ . It's very cold here in this room.______.A.so it is B.so it does C.so does it D.so is it