.He was feeling bad. He went to work, _______, and tried to fix his attention on it.
.The teache rfound ____ difficult to decide____ he would take with him to attend the conference.
Living things are dying out quickly.Let’s ask____destroying the in the pastyears.
The man who was being followed stopped from time to time____he wanted to ti ehis 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.