This is my dictionary.改为疑问句

Is this his dictionar?（改为肯定句）（）（）his dictionary.一个（ ）里只能填一个词. (1/3)把1—3改成复数句 给4、5、题提问 1、This watch is mine 2、Is this a dictionar 将下列句子变成一般疑问句,并作肯定或否定回答1、He is Black将下列句子变成一般疑问句,并作肯定或否定回答1、He is Black2、I am in Grade 1.3、You are workers.4、This is my book.5、That is an English dictionar 《This is my This is my this is my life my This is my This is my THIS is my this is my This is my this is my head my this family is This is my family This is my teacher my this family is this is my grandmother This is my love this is my family