Expected noises are usually more _____ than unexpected ones of the like magnitude.

From his _______expression, we can guess that the problem maybe was quite _______.

 — Dad, would you please buy some strawberries for me? I love them. — I’d like to, but they are not _____ in winter.

I tried hard to get some information about the new technology out of his mouth,but he remained __________.

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.