________ the machine begins to work, you can’t stop it _____.
—Is Bob still performing? —I am afraid not. He is said ___ the stage already as he has become an official.
She_____ have left school, for her bike is still here.
He decided to study ____ second foreign language in order to find ___ better job.
It __________ that the football match ________ put off because of the weather.
Only in this way __to make improvement in your study.