There are various medicines : in pills , tablets and tubes but all of them are used for the same purpose - to cure people. Most substances for medicine are taken from nature.
Each medicine should be tested so that it must be safe for people.
In most cases new medicines are new versions of old ones. They are improved to help people to feel better quicker.
When we were waiting for the bus, we saw an accident
1. Ought to
2. May
3. Must
4. Could
5. Cant
exciting
communicate
dull
<span>painful</span>