【题目】Traveling abroad _____________ to rich tourists and wealthy business people decades ago.
A. is limitedB. has been limited
C. was limitedD. had been limited
在线课程【答案】C
【解析】
考查动词时态和语态。句意：十几年前出国旅游还仅限于有钱的游客和富有的商人。根据时间状语decades ago可知应用一般过去时，主语Traveling abroad与谓语动词limit构成被动关系，故用一般过去时的被动，选C。