摘要：6．We have helped the animals in danger it has still a lot of things to do . A．so B．and C．but
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We have helped the animals in danger _________ it has still a lot of things to do .
A．so B．and C．but
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We have helped the animals in danger _________ it has still a lot of things to do
- A.so
- B.and
- C.but
the animals in danger __________ it has still 
a lot of things to do.
and