问题

Would you mind not littering in the classroom — ______ I’ll pick up the waste paper

A:Before
B:Where
C:Unless
D:Until

正确答案是：

同类题型

What did you say to your sister I saw her crying in the room.— It _________ my fault. I just said hello to her when I met her, nothing else.

The early pioneers hadto_____ many hardships to settle on the new land. [ ]

Do you have difficulty ____ English

28. They ____ friends since they met in Shanghai ten years ago.

The medicine works more effectively ________ you drink some hot water after taking it.