I. Use must have, can’t have, may have or might have with the verb given.
1. The Viking explorers _____________________________ brave to sail amid rough seas to so many places. (be)
2. He ____________________________! His luggage is still here. (leave)
3. The electricity ___________________. All the electric clocks are blinking. (go off)
4. He _________________________ you a letter. But none has arrived yet. (write)
5. I’m sorry. Our dogs ___________________________ your child. They have been in the house all morning. (bite)
6. It ___________________________. Look at all the puddles in the street. (rain)
7. John _______________________________ the best student I ever taught. (be)
8. I can’t believe he isn’t here. He