--These days I can only sleep for four or five hours at night as I’m too busy with my research work. --If you keep going on like that, you are sure to ______ sooner or later.
It is said in the book that Thomas Edison (1847—1931) ________ the world-leading inventor for sixty years.
Because the shop ________ , all the T-shirts are sold at half price.
The discussion ________ alive when an interesting topic was brought in.
The teacher, with 6 girls and 8 boys of her class, ________ visiting a museum when the earthquake struck.
Now that she is out of a job, Lucy ________ going back to school, but she hasn’t decided yet.