A survey of opinions of experts _______that three hours of outdoor exercise a week _______good for one’s health.
31. Attention must be paid to ______ science and technology..
30. When I first set _____ in Germany, I had no idea what the future may have ____ for me.
29. Heat capacity is the amount of energy it takes __________the temperature of a substance one degree centigrade.
28. This is the road ________ the mountain.
27. The photo _______ me of my happy childhood.