The correct answers are The main computer crashed, and it refuses to reboot., I lost my favorite wrench, but I think it is under the console., and The spaceship is old, but it still flies perfectly.

Slavic languages assign grammatical gender (masculine, feminine, neuter) to inanimate objects, leading speakers to accidentally call a computer "he" or a wrench "she." In English, almost all inanimate objects and concepts take the neutral pronoun it.