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#1 Agreement SUBJECT-VERB AGREEMENT THROUGH THE ELIMINATION OF PREPOSITIONAL PHRASES Instructions: Cross out the prepositional phrase(s) in order to determine the appropriate subject and its corresponding verb. Circle the correct verb. Exercise 1: 1) The cause of heartbeats (has, have) been a subject of continuous inquiry in the scientific and medical community. 2) The heartbeat, as well as other factors, (cause, causes) blood to flow throughout the body. 3) H. Allen and others (has, have) shown that the control of the nervous system is not linked to the beating of the heart. 4) The power of rhythmic contractions (belong, belongs) to the cardiac muscle itself, unassisted by other impulses. 5) All strips of muscle in the heart (is, are) capable of rhythmic action. 6) The power to trigger contractions (differ, differs) from part to part of the heart, however. 7) The greatest centralization of energies, as in many other organs and organisms, (is, are) located at the top. 8) The lesser energies of the heart (is, are) centered toward the bottom. 9) The number of beats of the heart per minute usually (decline, declines) with age, from as much as 140 at birth to 50 in an adult male. 10) The sequence of events in a single heartbeat (is, are) complex and well worth studying.