Don’t promise anything ______ you are one hundred percent sure.
A. whether B. after C. how D. unless
Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.
A. sense B. view C. means D. idea
American Indian ______ about five percent of the U.S. population.
A. fill up B. bring up C. make up D. set up
It is one of the funniest things ______ on the Internet so far this year.
A. finding B. being found C. to find D. found
There are plenty of jobs ______ in the western part of the country.
A. present B. available C. precious D. convenient
You ______ be hungry already — you had lunch only two hours ago!
A. wouldn’t B. can’t C. mustn’t D. needn’t
