_ the temperature down day by day,the leaves are turning yellow.

It seems that the students devote much time and energy _____ a high score in the exam.

— John seems happy, even though his wife left him and he lost his job.— I think he ____ to put on a brave face.[ ]

What shall we use for power when all the oil in the world has _____?

seeking a prime minister, ______ who willdevote himself to the interest of the country