Pain is now considered the fifth _____sign, as important as blood pressure, temperature , breathing rate and pulse in determining a person’s health.
The 13:30 train to Shanghai has been put off __________ the heavy storm.
You cannot take back your words _________ they are out of your mouth.
—What’s that noise? —There’s a truck stopping outside. It’s someone _____ something.
Remember me to your parents when you _____ them.
_____ time, the teacher had us do half of the exercises in class and complete the other half for our homework.