根据句意，用括号内所给词的适当形式填空
Do you know who invented(发明) the first ______(person) computer?
I want to be a ______ (violin) when I grow up.
At the _______ (begin) of the meeting, he told us an interesting story.
Everyone must make a ______ (week) plan carefully.
The little naughty boy ______ (fall) off the tree when he tried to climb it.