The police always take ________ of dogs’ sharp sense of smell to search for the survivors in the earthquake.

It said the country's confirmed H7N9 cases were isolated and there has been no______ of human-to-human transmission.

---A man is not born in ____ of knowledge.---True. We all gain our knowledge by keeping on learning in our life

Now that he has missed his      ，he’ll have to wait for the next round．

John says that his present job does not provide him with enough _____ for his organizing ability.