Conjugar el pasado simple, regular e irregular, en afirmativo y negativo

Dear Grandpa, [1] Greetings from Mérida! We arrived on Tuesday after a long bus trip from Mexico City. It took almost twenty hours, but I slept most of the way. [2] Yesterday we ________ Chichén Itzá. The pyramid is huge, and our guide told us many stories about the Maya. It was very hot, so we bought hats at the entrance. In the afternoon we swam in a cenote. The water was cold and very clear. [3] Today it is raining, so we are staying at the hotel and playing cards. Tomorrow we are going to take a boat tour in Celestún to see the flamingos. [4] I miss you! See you next Sunday. Love, Tomás