It’s said that there are plenty of hotels in that town. There _____ be any difficulty for you to find one to stay in.

The boy is old enough to ---------himself.

—May I watch TV for another 15 minutes, Mum?—Oh, dear, if you _____.

Since nobody gave him any help，he ________ have done the research on his own.

I find it astonishing that he ____ be so rude to us. I _____ make a complaint to his company.