Réponse:
1) You may see him if you're lucky
2) This might take longer than you think
3) I'm sure he must be working on it
4) She may went to see Jerry
5) He might already knows it
6) He may be interested but I doubt it
7) They must be caught in a traffic jam
8) He might come back
9) He must has left by now
10) He may be at the cafeteria