Question

The Boao Forum for Asia was held in April 2006, in which many governments officials and business leaders ________．

1. A.
   participated
2. B.
   attended
3. C.
   benefited
4. D.
   completed

Answer 1

A
participate in…：参加……；注意：attend后面直接接宾语，定语从句开头有介词in