Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.
Isn’t it amazing how the human body heals_______ after an injury?
So suddenly_______that the animals in the zoo looked very frightened during the total solar eclipse.
Imagine what today’s life would be like if Alexander Bell_______the telephone more than 130 years ago!
Parents must allow their children to receive_______education by law.
-----What do you suppose_______her look so upset ?----- _______by her boyfriend again.