Question

【题目】My mother was washing the dishes ________ I was playing the piano at that time.

A.sinceB.whileC.untilD.unless

Answer 1

【答案】B

【解析】

句意：当我弹钢琴的那个时候我的母亲正在洗碗。

考查状语从句。since自从……；while当……时候；until直到……；unless除非。根据“was washing the dishes”和“was playing the piano”可知前后句子表示同时进行，用连词while连接时间状语从句，表达“当我弹钢琴的那个时候”。故选B。