Clearly, if you are spending more than what you earn，you’ll have

Clearly, if you are spending more than what you earn，you’ll have to___________your belt, （tight）
【正确答案】：tighten
【题目解析】：have to do sth.意为”必须干某事“，其后要接动词原形，tight是形容词，意为”紧的“，其动词形式为tighten，绷紧。