University majors should not be ________ market demand and the government should give more support for “unpopular” majors such as literature, history and philosophy.
As there is less and less coal and oil, scientists are exploring new ways of making use of______________ energy, such as sunlight, wind and water for power and fuel.
—I’m sorry, but the manager isn’t here yet. Shall I have him call you when he comes back?
—No, I’ll call him later. If I call again in half an hour, do you think he ____?