1. Have you called Tom? Not yet.. I'm going to call him after lunch.
2. Have you had dinner? Not yet.. I'm going to have dinner in a little while.
3. Have you painted your apartment? Not yet.. I'm going to paint it soon.
4. Have you fixed my bicycle? Not yet.. I'm going to fix it this afternoon.
Объяснение:
Конструкция to be going to do smth означает "намереваться/собираться сделать что-либо" и используется, когда говорят о своих планах на ближайшее будущее.