Business English 10th Edition by Mary Ellen Guffey,Carolyn Seefer

تمرين 98

Some sentences with passive-voice verbs do not identify the doer of the action. Before these sentences can be converted to active voice, a subject must be provided.
Example: (Passive) New subscribers will be offered a bonus. (By whom-let's say by BusinessWeek.)
(Active) BusinessWeek will offer new subscribers a bonus.__________________________________
In each of the following sentences, first answer the question By whom Then rewrite the sentence in the active voice, beginning with your answer as the subject.
Only a few of the many errors and changes were detected during the first proofreading. (By whom) __________________________________________________________________________________