It is necessary to explain your theory _____, otherwise the audience won't make sense of what you are trying to get across.
The plant is dead. I _____ it more water.
There was plenty of times. She _____.
16. You _____ return the book now. You can keep it till next week if you like.
I thought you _____ like something to read, so I have brought you some books.
I _____ play football than baseball.