Science is interesting and exciting. Why? Science helps you __________ (1) the world in which you live. For example, science explains how airplanes fly and how birds find their way when they __________ (2) long distances. Besides, people use science to make discoveries that have __________ (3) value. One of these discoveries is the __________ (4) of light to carry telephone messages through a glass wire. __________ (5) is the lengthening of human life through the use of heart pacemakers (心脏起搏器) and other mechanical devices (器械). In the future, there will __________ (6) be an endless number of new discoveries. These discoveries will __________ (7) your career and your daily life. Television, computers, and space shuttles (航天飞机) are part of today's world. Who can imagine what new, yet-to-be-discovered -__________ (8) lie ahead? In the future, scientists may discover how to predict earthquakes and how to produce an endless __________ (9) of energy. __________ (10) you may live and work in a space station in orbit around the earth. Scientists will continue to make discoveries that will change the world in which you live. developments Anyway supply likely urge tackle Another practical Someday understand severe argument use affect travel