3 Möglichkeiten von *werden*

[JakeD]

Hallo,
mich würde interessieren, welche der 3 Satzformen korrekt bzw. falsch ist,
bzw. ob sie schlicht austauschbar sind:

1. The airport had fallen behind us and I was surprised at how the buildings and streets had become so much smaller.
2. The airport had fallen behind us and I was surprised at how the buildings and streets had gotten so much smaller.
3. The airport had fallen behind us and I was surprised at how the buildings and streets had gone so much smaller.

Vielen Dank vorab

[Delfino]

The airport had fallen behind us, and I was surprised at how fast the buildings appeared to be smaller and smaller.

Die Saetze sind nicht einfach austauschbar.