Давай заполним пропуски, используя Present Perfect или Present Perfect Continuous:
1. I have met two boys, Mike and Tim, and a girl Jasmine. (Present Perfect, так как это констатация факта)
2. We have been working together on a science project for the last two days. (Present Perfect Continuous, так как действие длилось какое-то время)
3. Tim has come to Education Camp since he was 6 so he helps us out all the time. (Present Perfect, так как указывает на результат в настоящем)
4. I'm exhausted because we have been swimming all morning. (Present Perfect Continuous, так как действие продолжалось все утро и результат виден сейчас)
5. I have joined the drama club and we've got a meeting now. (Present Perfect, так как действие завершено и имеет результат)
Ответ:
1) have met,
2) have been working,
3) has come,
4) have been swimming,
5) have joined
Ты молодец! У тебя всё получится!