Okay, let's complete the text with the Past Simple form of the verbs in brackets:
Last Saturday my dad 1) took (take) my friend, Harry, and me to the circus. My Dad 2) bought (buy) us some popcorn and orange juice. We 3) saw (see) lots of things at the circus. There 4) were (be) some lions. They 5) did (do) some tricks; they 6) jumped (jump) through hoops. A girl 7) rode (ride) an elephant around the ring. We 8) had (have) a lovely time at the circus.