About 60 percent of the students ________ from the south,the rest of them ________ from the north and foreign countries.
The theory he sticks to ______ to be of no use in our studies.
The life he is now used _____ quite different from ours.
He has changed a lot. He _______ not what he _______.
“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.”
“Shall Mary come and play computer games?” “No, _______ she has finished her homework.”