Do you know______man in white?－Oh, he is_________ scientist from America.

Martha is a girl. She always smiles and says hello to others.

My daughter is only ___________. But you are a ______________girl. She can’t understand those passages in the newspaper.

Luckily ______ to be no one under the tree when it broke down.

the team finished most of their research work?—Yes, but the rest rather difficult.