Question

【题目】The findings support another study which showed that being happy ______ reduce the risk of heart disease.

A. need B. shall C. must D. can

Answer 1

【答案】D

【解析】

试题分析：考查情态动词。句意：这个发现支持了另一项研究：快乐可以降低心脏病的风险。Need需要;shall将，会;must必须;can可能，可以；根据句意，选D项。