She looks very happy. She ______ have passed the exam. ——I guess so. It’s not difficult after all.

He is only too ready to help others, seldom, ____, refusing them when they turn to him.

We ______ speaking English at the English corner to improve our spoken English.

I pay the bill by check－ Sorry, sir. But it is the rules of our hotel that payment _______ be made in cash.

uldhave spent more time on English, otherwise I wouldn’t have failed in the exam —Youare right