填空题 The sociologist studies the complex way in which people interact with each other at parties.

填空题 He laid the foundation of the science of bacteriology.

填空题 Susan is an impulsive person. We never know what she will do next.

填空题 Young people need to be given the opportunity to make a difference in the world.

填空题 Astronauts want to explore the other planet that is suitable for human's living.

填空题 Traveling is full of adventure. All you need is being brave.

填空题 It has not yet definitely settled.

填空题 You should equip yourself with the knowledge you can acquire.

填空题 Schools must meet the challenge of new technology.