the undercover agent still investigating the case is a run-on sentence
First you need to know what a sentence fragment is and also what a complete subject and predict is. That should help you.
The prehistoric reptiles known as dinosaurs arose during the Middle to Late Triassic Period of the Mesozoic Era, some 230 million years ago. They were members of a subclass ofreptiles called the archosaurs (“rulingreptiles”), a group that also includesbirds and crocodiles.
Thanks!
The statement that was correctly written is this: Rajeev practices harder than anyone else in the orchestral.
Looking carefully at all the sentence given above, it can be seen that it is only the sentence in option A that obeys all the needed grammatical laws. The other three sentences are not grammatically correct. The correct sentences for the other options are listed below:
B. No one can be as impatient as my younger brother.
C. My friend, Sam draws better than anyone else in our art class.
D. His poem was shorter than all the other poems.