---Do you know why Anna hasn’t come to school today? ---I’m not sure. She _______ be ill.
The book named Journey to the west_____ by many people in different languages.
It’s a good way to learn about science there because you can ________ ideas.
---When ______ the football match ______? --- Next Saturday afternoon.
Some money which is given as a “present” in a competition is a ______.
“When did you ________, David?” “Ten minutes ago.”