Use the Present Perfect Tense is these sentences.

vera (enter) a photo competition
i (think) of a new story.
vera anb maxim (start) making a shool magazine.
kate (visit) the film studio.
she (write) a story about it for the magazine.

Vera has entered a photo competition. I have thought of a new story. Vera and Maxim have started making a school magazine. Kate has visited the film studio. She has written a story about it for the magazine.