Our lab is on the third _____ of a six—______ building.

Nobody knows the man killed in the accident, so it is difficult for the police to find out his _____.

The Postal Service announced Tuesday it had made a significant _______in getting machinces to read handwriting .

When we ___ a foreign language, we’d respect its ____, or we can’t really learn it well.

The most important _____ of his speech was that we should all work whole-heartedly for the people.