I often have conversations with John over telephone, while keep in touch with Tom by__________ letter.
I am sorry to say that our food is almost______. We cannot survive if there is no one to help us.
When the baby was crying, she started singing to him and was_______ with a smile.
Only______ people can have a good understanding of the lecture given by the scientist.
I_______ laughing when my son made a face.
She is an excellent student in our class, and she always________ herself in her studies.