Without the earth’s atmosphere to protect them, astronauts can be exposed to intense radiation from the sun, ____ them at risk of cancer.
Johnson had made up his mind to give it up, but on ______ second thought he determined to try _____ third time.
—Betty was feeling pretty blue for a while, but she’s better now. —_______.
The two football players seem like enemies on the field but _______ they are good friends.
Because it was hard to _____ with the money he got paid, he wanted to take ____ job.
The old couple decided to ______ a boy and a girl though they had three of their own.