-What do you think we can do for our aged parents?-You_______ do anything except to be with them and be yourself.
--Hi, Tracy, you look tired. --I am tired. I________ the living-room all day.
- The reason_________ he didn't come was _________ he had to take care of his sick mother.
-"Please __________why you're so late," said his girlfriend.
---- Is there anyone in your class ____ the name of Mary? ----____.
Swimming alone ____ be ____ dangerous. Do be careful.