Here are the filled sentences with explanations for the tense choices:
A: What are your plans for the weekend, Dave?
B: I am going (go) hiking in the mountains.
Explanation: "Am going" is the present continuous tense, which is used here to express a planned future action.A: It's really cold in here!
B: I will put (put) the heat on.
Explanation: "Will put" indicates a spontaneous decision or promise to do something in the future, based on the immediate situation.A: I've got so many things to do to prepare for my skiing trip next week!
B: Don't worry. I will give (give) you a hand.
Explanation: "Will give" shows a willingness or intention to help in the future, typically used for offers.A: When are you (you/be) free tonight?
B: I don't know. I'll call you when we get (get) home.
Explanation: "Are you" is present simple, which is used for general questions. "Get" is also present simple, used here to indicate a future action that is dependent on another action (calling).A: Why are you buying that guidebook about Antarctica?
B: I am visiting (visit) Antarctica next month!
Explanation: "Am visiting" is present continuous, indicating a planned future trip.A: What time does (the plane/take off)?
B: It takes off (take off) at 8:15 pm.
Explanation: "Does" is present simple, used for scheduled events such as flight times. "Takes off" is also present simple, as it describes a fixed schedule.
