單格填空第 16 題
The unexplained digressions into the finer points of quantum electrodynamics are so ______ that even readers with a physics degree would be wise to keep a textbook handy to make sense of them.
| Blank |
|---|
| (A) uninteresting |
| (B) controversial |
| (C) unsophisticated |
| (D) frustrating |
| (E) humorless |
出處：OG, p.512, #1