They will pay a visit to Europe in a couple of years they have enough money.
A. for fear that
B. on condition that
C. even though
D. as well as
网友回答
A. for fear that
(答案→)B. on condition that
C. even though
D. as well as
解析：考查连词辨析。A唯恐（表示主观上的担心）；B如果（if）；C即使，尽管；D和，同，也，并；句意：只要他们有足够的钱，他们会在一到两年里去欧洲旅游。根据上下文可知表示条件关系，故B正确。