Ok,I have the answer right

Ok,I have the answer right If you have __ try ,I am sure you will get the right answer chose the right answer choose the right answer: Choose the right answer. I b his answer to the question is right I want to know ____ it is the right answer. I wonder if the answer is right or not.(改错) I think the answer is right(改为否定句) C____ the right answer ,piease that' not the right answer Please choose the right answer