This is an orange.怎样改成一般疑问句?

This is an orange.怎样改成一般疑问句? An orange is orange.(改成一般疑问句) This orange is orange. 把这个句子改成一般疑问句. This is an orange.（改为一般疑问句） 一.改写原句That is an Orange .（改成一般疑问句）Is this a computer game?（作 lt is an orange(改为一般疑问句).---- ----an orange? This is an English book 改成一般疑问句 填空：-it green? It is an orange orange?(变成一般疑问句) — — an orange 把His favourite colour is orange改成一般疑问句 This is an orange lt is an orange shirt [改为一般疑问句] It is an orange（改为一般疑问句）