Our bad living habits will destroy the earth. Only by changing ____ we live can we save the earth.
Not until I ________ to work ____ how much time I had wasted.
–--I play high-temperature Yoga in the gym every Sunday. ---- Good habit, but the air in the gym is bad ________.
___________ his poem, he didn’t dare to submit it to the professor.
Completely ____________ computer games, he now doesn’t take classes.
__________ of furniture have been tested to guarantee good quality.