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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.
