If certain species _____ extinct, an expert in New York, says there would be enough resources to reintroduced them in the future.
From the situation in this financial crisis,you can see _____China is totally not ______ she used to be a century ago.
The manager ________ excited when he learnt the project ________ well.
It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.
The answer ________ the teacher,she asked the little boy to try a second time.
There is a saying which _______like this:, “Still waters run ______.”