The Fifth Euro-Asia Economic Forum, held in Xi’an on 1st October, 2013, is aimed to ____ economic exchanges between Asia and Europe.
— What has Jack been doing recently? —I don’t know _____ care.
Such a custom came into _______ long ago.
His parents wouldn’t let him marry anyone ______ family was poor.
He attends the evening class ____, that is, Monday, Wednesday and Friday.
Many tall buildings _______ in Shanghai in the past few years.