We have to ________ the wheat as soon as possible because a storm is on the way .
_____ leaves the room last ought to turn off the lights.
--Why didn’t you tell Ann the truth? --______ .
Is this school ______ they visited the other day?
--You’ve made great progress in your studies of English, haven’t you? --Yes, but much ______.
The students are ______ to hand in the exercises before class.