I think you could complain, _______, of course, you are happy with the way thing s are.
We ________ last night, but we went to the concert instead.
—I’ll tell Mary about her new job tomorrow. —You ________ her last week.
On Sundays there were a lot of children playing in the park, and _______ parents were seated together joking.
American people are wondering whether the newly-elected president and his administration will keep the nation safe and defend it _______ any terrorist attack in the future.
I’ll go to America to strengthen my English_______ it isn’t too expensive.