______ the maths problem is difficult， I’ll try very hard to work it out.

The president ordered that no time should be lost, and directed one of his high officials to __________ the matter in person.

–A homeless man won a lottery ticket. He became rich over night.—___________

31.The two ladies are _______ the same age, but there seems to be ten years _______ them

car knocked Jack down while he was playing on his way home. —Really? We are toldin the street.