Concept: The phrase "make do" means to manage with whatever is available, even if it is not perfect.Explanation: The sentence says we will buy more later, but for now we must use what we already have. That idea is best expressed by "make do." The other options do not fit: "make up" means to invent or reconcile, "make away" means to depart or steal, and "make out" means to understand or kiss. Therefore, the correct phrase is "make do."Answer: B. make do