Tom is the only one of the students in our school who_____late this morning.
The teacher found ____ difficult to decide ____ he would take with him to attend the conference.
Living things are dying out quickly. Let’s ask ____ destroying them in the past years.
The man who was being followed stopped from time to time ____ he wanted to tie his shoelaces.
____ he was fired by the company is ____ he didn’t work hard.
It is well known to us all ____ China sent up a manned spaceship to outer space successfully last year.