By law，a buyer should have（）opportunity to change his mind.
举一反三
- By law, when one makes a large purchase, he should have _______ opportunity to change his mind.
- I have no trouble ____(persuade) him to change his mind.
- The words of the buyer left a（）impression on his mind.
- It is no use（）with him, because he will never change his mind. A: arguing B: argue C: argued D: to have argued
- There is no __________ in arguing with him anymore. He will not change his mind.