We have to the questions before answering them.

What are those on the wall —Some photos ________ in Tokyo .

ere is less and less coal and oil,scientists are exploring new ways of making use of ______ energy, such assunlight, wind and water for power and fuel

______ a fresh mind for aninterview, be sure to have a good sleep the night before it.

Do you know anyone in Paris? –No, I’ll make friends once______