Question

【题目】Look at your dirty hands. You should go and wash your hands ________ you have lunch.

A. after B. before

C. while D. although

Answer 1

【答案】B

【解析】

句意：看你那双脏手。在你吃午饭之前，你应该去洗手。A. after在……之后；B. before在……之前；C. while当……的时候；D. although尽管，虽然。根据上文Look at your dirty hands.可知，是在吃午饭之前。根据题意，故选B。