Mark stopped (smoke) last year.
smoking
I want to keep (read) this book, it's so great!
reading
Tom agreed (lend) Mike his car for the afternoon.
to lend
Kim isn't thinking of (come) this late, so we might as well leave.
coming
Randy thanked us for (give) her a ride to school.
giving
The International Student Office recommends (take) this class.
taking
Laura's husband asked her (buy) some coffee on the way home.
to buy
Cathy planned (arrive) early to study for the quiz.
to arrive
We didn't have any money, so we just enjoyed (windowshop).
windowshopping
What time is it, Mary? Oh, no! I forgot (go) to my class.
to go
First, Juan spent time (play) golf, and then he practiced (play) basketball, but he just wasn't good at sports.
playing/playing
studying/practicing