Question

Yesterday he called ____me ____my office and told me the good news.

1. A.
   at, at
2. B.
   on, on
3. C.
   at, on
4. D.
   on ,at

Answer 1

D
介词辨析。Call on sb号召某人；call at some place参观某地；at one’s office在某人的办公室里。