Question

【题目】Scientists have ________ that the world's population will double by the end of this century.

A. numbered B. included

C. calculated D. designed

Answer 1

【答案】C

【解析】考查动词。句意：科学家估算，在这个世纪末，世界人口会翻倍。number“达到……之数；共计”，include“包含；包括”，design“设计”，以上三个动词均不合语境。calculate在此意为“估计”， 所以选C。