Use the verbs in brackets in the correct tense form (Pres. Perfect or Simple Past): 1. I (not / work) today.
2. We (buy) a new car last week.
3. We (not / plan) our holiday yet.
4. She (not / see) her mother for a long time.
5. He (buy) a new laptop yesterday.

1. I haven't worked today.

2. We bought a new car last week.

3. We haven't planned our holiday yet.

4. She hasn't seen her mother for a long time.

5. He bought a new laptop yesterday.

Объяснение:

С обстоятельствами времени today-сегодня, not yet- еще нет, for ...-на протяжении ...употребляется Pres. Perfect

С обстоятельствами времени last  week, yesterday -Past Simple