33. Yan'an used to be a revolutionary _____ for the Red Army.
It has been 60 years ______ the two countries established diplomatic ties.
He was a member of a dining club, the Bullingdon Club, ______ was famous for its hard drinking and bad behavior.
It is reported that the United States uses ____energy as the whole of Europe.
At the foot of the mountain ____.
.—How did you find TV series? —________