Some researchers believe that there is no doubt______a cure for AIDS will be found.
My house _____ when you visited Beijing last time, so I didn’t invite you to my home.
She had to drop out of school _____ her family couldn’t afford the cost of her education.
The old man has retired from the factory. He _____ there for 30 years.
—I don’t mind telling you what I know. —You _____. I can manage it myself.
The decorations were so lovely that they _____ in a short time.