Please excuse me _______ your letter by mistake.
The population of Africa is ________ so rapidly as to cause concern of the whole world.
Most senior high school students are working hard day and night to pass the college entrance examination, gaining ______ to a university.
On his way to the airport, it ________ him all of a sudden that he had forgotten her birthday.
—I really thought I’d be offered the chance. —Oh, well,,Vicky____.
We had wanted to finish our task by noon, but it didn’t quite ________ as planned.