It was quite a long time I made it out what had happened.
The Fifth Euro-Asia Economic Forum, held in Xi’an on 1st October, 2013, is aimed to ____ economic exchanges between Asia and Europe.
Peterson used to work in a remote mountain village school, which is only _____ on foot.
-- Did you visit your grandparents yesterday?--Yes, and when I got there, they _____ in the fields .
_____ is known to all is that effective measures should be taken to deal with the problem of the over-exploiting of our resources.
In Australia, surfing is a popular sport among young people _____ they can seek excitement and adventure.