Question

【题目】You’d better wash your hands before meals you healthy.

A. keepB. keptC. keepingD. to keep

Answer 1

【答案】D

【解析】

句意：你最好饭前洗手来保持健康。根据句子结构可知用不定式作状语；keep动词原形，kept过去式，keeping动名词或现在分词，to keep不定式结构；故选D。