2 Complete the sentences using the correct form of a word from the box above. 1 A teenager emailed a .............. to the government about the dangers of an approaching comet. 2 I'm not very good with using.......... I'm afraid gadgets unnerve me! 3 He's a real............ manuals, on astronomy - there's nothing he doesn't know about the stars. 4 When the mouse mat was first introduced, it was regarded as a ..................new idea. 5 I was............... project. surprised by the success of the project.​