---- Did he come back early last night? ---- Yes. It was not yet eight o’clock _______ he arrived home.
It is said that the engines of Flight MH370____while flying over the Indian Ocean,with all on board killed .
—People often don't appreciate what they have, do they? —No, _____ they lose it.
—Did Ann fail in English?—She ____. Don't you notice that she looks depressed?
People believe that the China Dream is not very difficult ____ so long as the whole nation works hard for it.
Try not to cough more than you can_____since it may cause problems to your lungs.