Give the correct tense/ form of the verbs in brackets

IV. Give the correct tense/ form of the verbs in brackets. (1 pt.)
1. She said she (buy)___________ that car the following day.
2. It's not easy (give) ___________up smoking. My uncle has tried to do it lots of times without success..
3. I’m looking forward to (meet)___________you again soon.
4. I don’t know where (visit) ___________this summer vacation.