【题目】Over the last few decades, economic globalization _____ greatly to global growth.
A. had contributed B. has contributed
C. contributed D. contributes
在线课程【答案】B
【解析】考查动词时态。句意：过去数十年，经济全球化对世界经济发展作出了重要贡献。根据Over the last few decades最近几十年里，可知句子用现在完成时态，故选B。