Fill in the blanks with an appropriate preposition.

Venus, the second planet ………………………. (from / to) the Sun, and Earth, the third, started out as virtual twins. But …………………….. (in / at / on) some point in their 4.5 billion year histories, something horribly went wrong ………………………. (in / on / at) Venus. The greenhouse effect wreaked havoc, making Venus a hellish kiln …………………… (by / with / of) hot and dry surface and crushing atmosphere made ……………………… (of / up / up of) carbon dioxide and sulphuric acid. The two planets were, in fact, very similar ……………………… (in / at / from) the earlier days of the solar system. And then they evolved in different directions, but according ……………………………… (to / with / of) the same rules and explanations.
Long, long ago, Venus was a much wetter place, probably …………………….. (with / by / of) liquid water oceans like those on earth and like those that scientists think once existed on Mars. Eventually the oceans boiled …………………….. (up / off / over) and all the water ended up as water vapor in the atmosphere.

Answers

Venus, the second planet from the Sun, and Earth, the third, started out as virtual twins. But at some point in their 4.5 billion year histories, something horribly went wrong on Venus. The greenhouse effect wreaked havoc, making Venus a hellish kiln with hot and dry surface and crushing atmosphere made up of carbon dioxide and sulphuric acid. The two planets were, in fact, very similar in the earlier days of the solar system. And then they evolved in different directions, but according to the same rules and explanations.

Long, long ago, Venus was a much wetter place, probably with liquid water oceans like those on earth and like those that scientists think once existed on Mars. Eventually the oceans boiled off and all the water ended up as water vapor in the atmosphere.