Step-by-step guide to finding the correct answer
A) Hi, how are you?
B) A bit nervous. I _____ (wait) for days to hear about my exam results. I'm sure I _____ (not do) very well.
1. Read the sentence. Sometimes you have to read the sentence before and after your sentence as well
2. Ask yourself: is this an unfished, finished, repeated or continuous activity?
3. If the answer is finished: present perfect simple
4. If the answer is unfinished, repeated or continuous: present perfect continuous