Student or Learner
"Do you think you can come tonight?" "I doubt it."
Can I say "I doubt that" in place of I doubt it?
Carol: I heard Joe is bringing his new girlfriend to the party next weekend. This is going to really upset Jill because Joe just broke up with her.
Ken: I doubt that. Jill's bringing someone to the party too. So the score's gonna be even in this "game". (gonna - informal and common pronunciation of "going to" among native speakers of English)