Unfortunately, when I dropped in, Dr. Green ______, sowe only had time for a few words.

Do you know _______ the girl in red is—I’m not sure. Maybe a doctor.

What will we do when all the oil in the world has

(2013·江西鹰潭一中高三一模)What a pity! Considering his ability and experience, he ________ better.

Why do we get up so early— If we ______ the flight we would have to stay herefor another day