Evidence obtained from observation and experiment is often used to _____ a scientific theory.
. She is the only one among the ______writers who _____stories for children.
. ________in a white uniform, he looks more like a cook than a doctor
. —She must have gone back to the valley. —No, she_________. The entrance to it was nowhere to be found.
. He insisted on going abroad to have further study ____ his parents’ objection.
. ____ time and labor, you should join hands ____ him in the business.