Question

【题目】He has given up smoking ever since he ________ a bad cough. (catch)

Answer 1

【答案】caught

【解析】

句意：自从他咳嗽得很厉害后，他就把烟戒了。

since引导的时间状语从句，主语用现在完成时，从句用一般过去时，catch的过去式为caught。故填caught。