— Has the little boy who saved the drowning girl left the school?— Not yet. He _______in Room203 of the teaching building right now.
Mark said that he was unfit for the job, so he decided to _____ from the company.
—If not controlled, some terrible diseases will spread in the stricken areas after the terrible earthquake.—So people there are in _____ need of medical teams.
Foreign trade, the ____ of goods between nations, takes place for many reasons.
The famous professor’s lectures, though ____ informal, are considered far more informative and interesting.
____ through Africa, the infectious disease jumping from children to adults killed 1,000 people.