问题
选择题
The old people ______lonely at all since we began to visit them once a week.
A．haven’t felt
B．hasn’t felt
C．didn’t feel
D．don’t feel
答案
答案：A
since引导的时间状语从句，主句通常用完成时态，结构为have或has+过去分词，主语是people，表示复数，故用have，故选A。