If it ________ for the heavy rain then, we would have arrived here ahead of time.
—Hi, Tom . Any idea where Jane is?—She _____in the classroom . I saw her there just now.
We should consider the students' requestthe school library provide more books on popular science.
Professor Williams keeps telling his students that the future ______to the well-educated.
With the world changing fast, we have something new _______with all by ourselves every day.
—I’ve got to go now.—Must you ?I ______you could stay for dinner with us.