The big fire in Shanghai, believed to ______ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there.
___ your English, you’d better practice every day.
My dictionary ___, I have looked for it everywhere but still __ it.
When __ alone, the child will make trouble.
Peter __ come with us tonight, but he isn’t very sure yet.
---The computer cost him 20, 000 dollars. ---It ____ be that expensive.It’s a used computer.