Complete the sentences with the correct form of the verbs in brackets. Use the present perfect simple or present perfect continuous.

I’m a teacher and this week has been a very hard one for me. Since last week, I 1 ____________ (correct) my students’ notebooks, but I 2 ____________ (check) only about half of them so far. I 3 ____________ (not answer) all the emails from my students yet. Not enough time! Also, for the last few weeks, some students from my class 4 ____________ (prepare) for a performance for a school ceremony next week. One problem is that Robbie, our main actor, 5 ____________ (not learn) his role properly yet!