Which of these sentences is in the present perfect? 1) i have only good marks at shool. 2)he`s going to travel all year 3)david`s come to the party early. 4)before we met i had seen him twice at my work. 5) do you have any questions about this story?

3)David`s come to the party early.

Только предложение №3 David`s come to the party early =David has come to the party early. Это время Present Perfect, образованное при вс глагола has + смыслового глагола to come  в третьей форме (come-came-come)