Look! There is a big river. Let’s swim in it!—No, I think it’s _________ dangerous.

That day, we______ for the train station when Tom fell and hurt his legs badly.

About _______of the engineers in my company seem to be in their _________．

The old man lives________, but he doesn’t feel________.

It’s time to say goodbye to my school.I’ll always remember the people have helped me.