We know that about seventy percent _____ the earth _____ covered by water.

–Do you know where David is I couldn’t find himanywhereWell He _____ have gone far — his glasses are stillhere

Mr. Liu insists that the price of petrol _____ too high and that he ____ his car.

Please ______ the traffic regulations.

ought that as he had worked for the company for so long, he higher pay.