Mary is sick. She ________ drink cold water.
shouldn't
If you want to be a good writer, you ________ read a lot.
should
If there is a fire, you ________ leave the building quickly.
must
I ________ finish this project by the end of the week.
must
People ________ drink water every day to be healthy.
must
You ________ be 18 years old to drive a car.
must
You ________ take a break and relax after a long day at work.
should
You ________ wear a helmet when riding a bike.
must