In public places, we can often see ______ that tell us useful things, such as no parking, no smoking, etc.

After the earthquake, the first thing the local government did was to provide ________ for the homeless families.

There is an obvious __________ between the cultures of the West and East.

The top leaders of the two countries are holding talks in a friendly ______________.

She made a ______ in our plan to play basketball when it started to rain.