Which sentence has a shift in verb tense?

the barrier will drop down every time that a train approaches the crossing.

if anyone knows the answer, she does.

as i came in the front door, eddie is going out the back door.

a row of ants had filed up the chair leg and was about to consume our lunch.

pls

As I came in the front door, Eddie is going out the back door.

Explanation:

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: