New drugs can cost £30,000 for a single course, and bills of £100,000 or more are far from unknown.

Taking a single course might also give you a window onto a profession.

The core of the program for first year students is a single course in number theory.

This means one takes a single course over a 3 1/2 week span.

He went over every possibility, and still returned to the single course of action.

This, then, leaves us with but a single course of action.

He began to wonder if there was perhaps a single logical course to take.

So that leaves us with a single remaining course open.

After a single course about 80% of people are improved with more than 50% completely so.

The training, offered for a cost, may range from a single course to an entire program of ten or more courses.