--______ a volunteer is great.
-- I think so. Some of us want ______ volunteers for the next Olympics.
| A．Being, being | B．To be, being |
| C．Being, to be | D．To be, to be |
--______ a volunteer is great.
-- I think so. Some of us want ______ volunteers for the next Olympics.
| A．Being, being | B．To be, being |
| C．Being, to be | D．To be, to be |
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