TOEFL Reading: ETS-TOEFL阅读机经 - Y0WN_6IYAJBDRI5QL$

Look at the four squares [] that indicate where the following sentence can be added to the passage. A. If we consider 100 raven masks made by different carvers, for example, some will have been well executed, others less so, and one may have been made by an exceptional carver.