<p dir="ltr"><span><span>This question is a simple sentence that fits the pattern: S + V + O + OC. </span></span></p><p dir="ltr">Over one-third of the survey participants + V + the city’s garbage collection fees + too high.<span><span><br></span></span></p><p dir="ltr"><span><span>The subject (S) “Over one-third of the survey participants” is followed by a verb (V), which is a blank in this question. </span></span></p><p dir="ltr"><span><span>The object (O) is “the city’s garbage collection fees” and the object complement (C) is “too high.” </span></span></p><p dir="ltr"><span><span>Simply put, the blank should be filled with a verb. </span></span></p><p dir="ltr">All four choices are verbs. The key to identifying the correct answer is the concept of “subject-verb” agreement. <span><span><br></span></span></p><p><strong>Subject-verb agreement rule:</strong><br></p><p dir="ltr">The subject of the whole sentence “Over one-third of the survey participants” is plural, and it should go with a plural verb. Only choice (B) consider follows the rule, so it’s the correct answer. All the other three choices are singular verbs. <br></p>