问题
选择题
Fruit and vegetables are good for us. We need them __________ healthy.
A．keep
B．keeping
C．to keep
D．keeps
答案
答案：C
题目分析：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。
搜题请搜索小程序“爱下问搜题”