Up to Tuesday's attack, the worst school shooting in the U. S. was in March 1998 in Jonesboro,________ two boys, aged 11 and 13, shot and killed a teacher and four girls.
Instead of telling the joke he had planned, Crystal _________ a new one.
Animals are more ____ to the environment than human beings, which is how they survive.
—What is your primary goal, Miss Sang Lan? —To __________ better treatment for disabled people.
I believe that human cloning is wrong. If we toy with nature, we will have to deal with the _______.
Even though human cloning is causing a lot of anxiety, it is ______ good news for Faye Wilson, ______ 41-year-old saleswoman who cannot have a baby.