Boss ___ us taking some days off to get refreshed after so many days of hard work.
What some people don't realize is ________ difficult life can be after they get addicted to drugs.
Don't put off till tomorrow ________ you should do today!
—Don't you believe me?—________, I'll believe ________ you say.
The reform has changed the whole nation. It cannot remain ________ it used to be.
Evidence has been piled up ________ drinking water after getting up in the morning contributes to one's health.