A cut in the tissue is easy to heal but a(an) _______ to the heart, if possible, takes a long time to do so.
. When asked why he went there, he said he was sent there ____ for a space flight.
. They desired that they _____ the right to vote.
. He was about to go out for a walk _____ his teacher came to visit him.
.With no one to ______ in such a frightening situation, she felt very helpless.
. He began to take political science _________ only when he left school.