—What do you think of teaching,Bob?—I find it fun and challenging.It is a job ________ you are doing something serious but interesting.
It is________ten;I must leave now.
It is no use________your failure________your teacher.
A lot of people died________the terrible earthquake in Japan this year.
He spent________money on books and________his books are about space and satellite.
I came here only to________that everything was all right.