22. —Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
Young as he is, David has gained _______ rich experience in _______ society.
--- Tom, how about going for a picnic this weekend? --- _________. I love getting close to nature.
I was really anxious about you. You ______ home without a word.
Wilma became the first American woman to win three Olympic gold medals in track, ________ made her mother very proud.
She took her son, ran out of the house, _______ him in the car and drove quickly to the nearest doctor’s office.