She wants to apply for a ________ in the office of the new government.

There has been a（n）____of sadness in the small town since a boy was drowned in the river．

After dinner the minister made a short _____ to the guests.

The lack of eco-friendly habits among the public is thought to be a major _____of global climate change.

Sometimes, the _____ of humor in this country causes misunderstanding in other countries.