Whodunit? (Who's done it) / Modal perfects' practice

Dear students,

Today we have read a text about a crime  called whodunnit and now it's time for you to answer some questions about the text.

You can find the text here. As the text is not very easy, I have prepared a vocabulary list to make it easy for you. If you want to access the vocabulary list, click here.

Last but not least, you are going to answer the following questions using the modals for speculation.

Question 1: How could the drawing have been stolen? 
Question 2: Who is the most likely suspect?
Question 3: Could they have prevented the robbery?