题目内容
- Shall we go for a picnic in the forest park tomorrow?
- Yes, ______it rains heavily.
A. if B. unless C. until D. when
B
练习册系列答案
相关题目
题目内容
- Shall we go for a picnic in the forest park tomorrow?
- Yes, ______it rains heavily.
A. if B. unless C. until D. when
B