. –Mary, is this ______ umbrella?–No, it’s not mine. It is _______.

______adultsbegantolearnEnglishinthissmalltown.

People all around the nation were so excited upon the return of the three astronauts. [ ]

Sorry, I can’t work out this problem. —Try again, please. It’s only ______ difficult.

Children _______ sit in the front seat of a car. It’s too dangerous.