_______ all the inventions have in common is _____they have succeeded.
A. What; what B. That; that C. What; that D That; what
The government has to close those small factories to prevent the water of the river ______.
A. polluting B. from polluting
C. being polluted D. polluted
He wants to see changes in the company and I am sure he will，______.
A. on time B. in time C. at one time D. at a time
The traditional view is ____ we sleep because our brain is “programmed” to make us do so.
A. when B. why C. whether D. that
Then you usually lie there just ______ the ceiling, thinking about everything that could go wrong.
A. glancing at B. watching at C. glaring at D. staring at
—What do you think of his opinion?
—None has given me ___________ piece of advice.
A. a better B. a best C. the best D. the better
