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I would like to live on Mars although/despite the harsh climate. 2. There might be life on other planets, however/yet we May never know. 3. The sciense-fiction story was both/though exciting and frightning. 4.Some bacteria are more and more deadly. Nevertheless/What is more, the medicine we have doesn't kill them. 5 Technological advances can do great things for humantly. However/What's more, we should be careful they don't destroy the planet. 6.Aliens must exist somewhere because/though there are so many other stars and planets. 7.I think humans will travel into space although /despite it will be very dangerous.​​