They want to know ______do to help us.
The price of vegetables is now much _____ than ten years ago.
The teacher's eyes, without any expression, _____ the boy who made faces.
Next winter, _____ you will spend in Harbin, I'm sure, will be another exciting holiday.
—I've made up my mind to go abroad next year, darling, what about you? —Well,_____ you're going ,so will I.
Last term our maths teacher set so difficult an examination problem _____ none of us worked it out.