Choose the correct answer

Ex1. Choose the correct answer
1. "Where do you think Rooney is today?". "I have no idea. He _____ late."
a. should have left c. would sleep
b. would have sleep d. may have slept
2. Berbatov painted his bedroomblack. It looks dark and dreary. He _____ a different color.
a. had to choose c. must have chosen
b. should have chosen d. could have been choosing
3. The children _____ "thank you" to you when you gave them their gifts.
a. will have said c. should have said
b. must say d. should say
4. If we had known your new address, we _____ to see you.
a. came c. will come
b. would have come d. would come
5. These two boys look identical. They _____ twins.
a. must have been c. should be
b. must be d. should have been