After living there for one year, they have ____ there.
—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.
—Look, it ____ again. —Yeah. This is the third snow we ____ this spring.
All attentionon the beautiful girl, the boy didn’t notice the teacher enter the classroom.
Constant practice has erased my accent to a pointmany people think I’m a native speaker.