__ is going to see the film Titanic again because this year marks the 100 years since the Titanic sank(沉没) in the ocean.
—Shall we go to the park? — __________________
—Humans can’t live _______ air. —I agree with you.
____ up late at night is bad for your health.
— ____ do you clean the classroom? — Three times a day.
He prefers _______ to __________.