—Why did Sam weep?—He couldn’t stand _______ like that before the whole class.
He failed the final examination and only then ____ how much time he had wasted.
Recently, however, scientists have been finding that long-term use of these fertilizers can cause damage to the land, thus _____it less fertile.
When the area was _______ by the flood, the government organized people to send food and medicine there immediately.
People should ______the traffic rules when they travel to a new place. Nobody can be exception.
So far, some advanced teaching equipment, together with three hundred new books, ______ to those schools in the faraway area.