Fill in: sink, make, admits, release, keep on. 1)he it's getting more and more difficult to work with alligators. 2) they are planning to the tiger back into the jungle. 3) we saw the boat into the wate. 4) the research team tried to. their way through the thick forest. 5) he's determined working with reptiles although they are dengerous.

1) He admits that it's getting more and more difficult to work with alligators.
2) They are planning to release the tiger back into the jungle.
3) We saw the boat sink into the water.
4) The research team tried to make their way through the thick forest.
5) He's determined to keep on working with reptiles although they are dangerous.