Fred, who had expected how it would go with his daughter, had a great worry______ his mind. A. on S. in C. with D. at
——Do you mind my taking this seat? ——________.
______, I am not satisfied with your work.
I knew I should not accept anything from such a person but I found it difficult to turn down his ___.
He was seen ______ a letter in his bed room.
——Don't you think it's going to rain over the weekend? ——_______.