I spend(spend) lots of time on my work last week.为什么填spend.

I spend(spend) lots of time on my work last week.为什么填spend.
I spend(spend) lots of time on my work last week.为什么填spend?
They played with snow happily(happy).为什么填happy?
I will give you something to eat(eat).为什么填to eat?
Alice's drawing is more beautiful(beautiful)than Lucy's.为什么填more beautiful?
what about playing(play)busketball.为什么填playing?