(2013·亳州模拟) difficult and challenging the task may be, we must finish it on time, because there is a possibility we’ll be fired if we can’t fulfill the task on time.
It suddenly __________ to the detective that the millionaire was probably murdered by his own daughter.
It suddenly __________ to me that they went there by bike.
By hiking, people can __________ nature and enjoy a new kind of life.
-How did you find the rock music concert last night? -__________.
There were only __________ as ten years ago on the hill.