President Hu Jintao congratulated the three astronauts, ________ the voyage“another milestone in the Chinese people’s march towards aerospace science．”

1. A.
   speaking
2. B.
   saying
3. C.
   expecting
4. D.
   calling

President Hu Jintao congratulated the three astronauts,         the voyage “another milestone in the Chinese people’s march towards aerospace science.”

A．speaking         B．saying          C．expecting           D．calling