—Which month has ______ days in a year?  —February.

--We spent all our money because we stayed at the most expensive hotel in town.--Why didn’t you stay at _________ one?

More and more people have a low-C life and the air is getting much    than a few years ago.

----How is your new math teacher ? -----We couldn’t find a _____ one . All the students love her very much .

—Which country has________population ,China , India or America?— China.