Word came _______ the students would put off the outing until next week, when they wouldn’t be busy.
In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.
Hiking by oneself can be fun and good for health. It may also be good for ______ building.
China has got a good for fighting against the flu with its careful and smooth organization.
To save some of the human languages before they are forgotten, the students in our school started a discussion “Save Our ________”
The young man made a ______ to his parents that he would try to earn his own living after graduation.