— Must we go to see a doctor at once when we have the flu?—No,_____.A. we mustn’tB. we shouldn’tC. we don’t have to
It’s cold outside. ______ your sweater before you go out.
The teacher did what he could _____ his students.
He works _____ in English, but he can ____ make progress.
Teachers often tell their students _______ across the road when the traffic light is red.
–Lots of trees and flowers ________ on both sides of the road last year. --Oh, _______ beautiful they are!