He told John to stay in bed until he ____ well enough to work A.feels B.felt
问题描述：
He told John to stay in bed until he ____ well enough to work A.feels B.felt
答
B
主句是一般过去时 told（过去式）
时间状语从句until “直到..”,与主句使用一致时态,过去时,所以felt