Put the correct noun form of the underlined verb in the gap to complete the definitions.
1.If<span> </span>you<span> </span>invent<span> </span>something<span> </span>important<span> , </span>this<span> __ </span>may<span> </span>become<span> </span>famous<span> . </span>
<span>2</span><em /><span>.</span>Something<span> that arrives , such as a plane flight , is an __ . </span>
<span>3. </span>You<span> </span><em /><span>can say </span>you<span> improve something, or that you make an___ to it.</span>
4.Something you publish , such as book or a magazine is a ___.
5.If you explain something clearly , then you are giving a clear ___.
6. Someone who trains people to do something as a ___.