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Now that the sign reads, “No person ______ smoke here”, please choose a seat in the smoking area over there if you _______ smoke.

— Don’t forget to watch the game and cheer for our team tomorrow.
—OK, I ______.

——The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
——____ Tom have a try?

They were determined to carry out the plan at first, but then we ________ persuade them to change their minds.

--- I promise her daughter ______ get a nice present on her birthday.
---Will it be a big surprise to her?

— Oh, my cat is really fat.
— You __ have given her so much food.

—Is Mary coming by plane?
—He should ,but he _____not. He likes traveling by train.

Don't blame such a small boy any more. Even the wisest___ make a mistake sometimes.

There ____ a temple on the side of the mountain, didn't there?

—Why can your neighbor know so much about London?
—He ____ have been there before.