Question

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

Answer 1

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。