259. At present, what _____ most heavily on American people is the terrorist accident(恐怖事件).
.– How much did you pay for that? --- I paid _____ that you paid.
.More than one girl _____, as we expect.
As we all know, two thirds of the earth’s surface is water, ___ a lot of fish.
Jack is the ______- child in the family; he wants to have a brother.
Only in this way, directed by the teacher, ______work out the problem the day before.