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1 As a moderator / web designer, I need to check our forum for bad posts and delete them.
2 An amateur Polish astronomer recently invented / discovered a new planet.
3 The team carried out / came up with a lot of research on this new drug.
4 There must be something wrong with my computer software/hardware. It's most probably a hard disk drive.
5 We were high in the mountains and none of us had a phone signal / router so we couldn't connect to the Internet.
6 We often do / make experiments in our science classes.