It is safe to eat chicken that________fully, but most people still dare not do that because of the H7N9bird flu .

Which hobby do you think the least space? —Collecting stamps.

I’m sorry to say that I didn’t ________ him to become a successful writer .

____ you play ____ piano ____ when you were young?

The struggle against the bird flu and the suffering _________ brought about have become a big concern across the world.