I’m afraid I’m not ____ to help with the show, for I am fully occupied with my own project.
—What’s the matter with Tim?—Oh, Tim’s cellphone was left in a taxi accidentally, never ____ again.
It was believed that things would get worse, but ____ it is they are getting better.
I ____ to go for a walk, but someone called and I couldn’t get away.
—The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?—____ my students have a try?
He is only too ready to help others, seldom, ____, refusing them when they turn to him.