一、单选题
1.He is only too ready to help others, seldom, ________, refusing them when they turn to him.
A. if never B. if ever C. if not D. if anything
2.— Taking in less fat and salt and doing more exercise must be a reliable method of keeping
fit, _____?
— Of course. Why not try it?
A. mustn’t they B. mustn’t it C. aren’t they D. isn’t it
