Is the group of words a sentence or a run-on sentence? most dogs have long tails, pugs have curly tails.
a. sentenceb. run-on

A(n) __ clause should always be separated from the rest of the sentence by commas

What do mcmahon’s references to thomas carlyle and john stuart mill do for his own image and credibility?

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal