根据首字母提示,在空格内填入适当的单词,使句子完整.
1He u______ to work in a factory ,but now he's a teacher.
2After a careful d ______ ,they decided to put off the meeting.
3We must take some a ______to protect wildlife.
4The government realized it was a serious problem and began to r______ the pollution.
5Please give my r______ to your parents.
6Suddenly the bus was out of c______and fell into the river.