english modal verbs

Put the following modal verbs into the blanks. You may need a negative!

Can Might Must Will Would

I can’t believe I’ve lost my keys again! This is the second time this week. I really (1)___ stop leaving them in bad places. My dog (2)___ have eaten them, though. He loves eating everything. But if he had eaten them, he (3)___ look horrible right now, and he doesn’t. So the keys (4)___ be inside him. Oh! There they are! Finally! From now on, I (5)___ only leave them on the entry room table!