My uncle __________ in Taiwan for 20 years. Now he has settled down in mainland.
—I really can’t thank you enough —.
—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?