He insisted that his plan _______ carried out at once.
It __________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
No one __________ be more generous; he has a heart of gold.
-Why are your eyes so red? You __________ have slept well last night.-Yeah, I stayed up late writing a report.
Harry is feeling uncomfortable. He __________ too much at the party last night.
When I was a child, I __________ watch TV whenever I wanted to.