Please don’t speak at one time. George may take the ____ after the two women each say a few words.

_____ you have the chance to study, you’d better make full use of your time

Our hospital needs two ___ doctors, Mrs Li. You can ask your son to have a try.

There are about _________ students in our school and about ________ of them are girls.

You’ve dropped ________“s” in the word “necessary”.— Oh, ________letter “s” is doubled.