I think Mrs. Stark could be _______ between 50 and 60 years of age.

 — Who would you like to see you off at the airport?—           . Just say “good-bye” at home.

We chose the persons and these people did      .

______ is too difficult in the world if you put your heart into it.

I wanted to buy a copy of The Youth, but there was _______ left in the bookshop. _______has just bought the last one.