Fill in the blanks. Scientists on Venus are discussing the f_____(1) of landing a manned flying saucer on Earth, b____ o____ (2) information received from a satellite. Their c_____ (3) are that Earth is u_____(4)for habitation because of its highly p_____(5) condition.For one thing, d_____(6) gases in the a_____ (7) make it e_____ (8) dangerous to breathe. For another,the water has become undrinkable. For these reasons, it would be difficult for anyone to survive on Earth. Undoubtedly the flying saucer program will be s_____ b____(9) under these conditions, but the Venusian scientists are determined to p_____ (10) with their exploration of Earth.