30. The giant panda is an ________ .
Do you know the stages every inventor must ________ before they can have their invention________ .
The dodo became extinct fairly recently so its DNA is still ________ .
Exactly when the first people arrived in ________ we now know as California, no one really knows.
The patent officer ______ with my file explained to me that a plant variety is not a/an _______ invention as it is a result of adjusting growth scientifically.
The scientist __________ the experiment for half a year, but he _______ yet.