Question

【题目】 Fruit and vegetables are good for us. We need them __________ healthy.

A. keep B. keeping

C. to keep D. keeps

Answer 1

【答案】C

【解析】

试题分析：句意:水果和蔬菜都对我们是有益的，我们需要它们来保持健康。这里的谓语动词need，动词不定式来作目的状语，根据句意故选C。