Question

【题目】They arrived while we__________ dinner.

A. Have B. are having

C. were having D. had

Answer 1

【答案】C

【解析】本题考查状语从句。while当……时候，句意：当我们正在吃饭的时候，他们到了。主语为一般过去时，从句为相应的时态，故选C。