---How many Chinese astronauts ______ into space since 2003?
----Twelve , including two women.
| A．were sent | B．sent | C．have been sent | D．have sent |
---How many Chinese astronauts ______ into space since 2003?
----Twelve , including two women.
| A．were sent | B．sent | C．have been sent | D．have sent |
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