Read the following passage and mark the tetter A, B, C, or D on your answer sheet to indicate the word that best fits each numbered blank.

SPACE EXPLORATIONS
In die past, explorers went around the world and discovered new lands. They were brave people and they changed the history of the world. Nowadays, there are only a few places ___(1)___ we haven’t fully explored yet. We are still trying to find out more about die North and South Poles, but there is very little we do not know about the rest of the planet Earth. On the other hand, we have only just begun to explore the moon and other ___(2)___. Space is still a mystery.
Space exploration is not just an adventure or a game. It is important because it ___(3)___ help us solve some very serious problems. For example, there have been changes in the earth’s climate in the last few years. As a result, both people who live in cities and farmers who grow crops are worried that there ___(4)___ not enough rainfall.
The solution may be in space. In a few years’ time, scientists will have bases ___(5)___ the moon which will help us control the weather.