Everthing we eat and drink contains some salt;we can meet the body’s need for it from natural sources without turning___the salt bottle
.--- ______,he knows a lot of things.
The play had already been on for quite some time when we __ at the New Theatre.
Once again he didn’t hand in his homework _____ he had been given enough time to do it.
--- They live on a busy road. --- There ______ be a lot of noise from the traffic.
_____ the chapter four times, I finally understood the author's theory.