bob is not promised to join in the football match____ he has to help his parents on the farmA、ifB、asC、unlessD、when

分类: 作业答案 • 2022-01-02 15:21:41

问题描述：

bob is not promised to join in the football match____ he has to help his parents on the farm
A、if
B、as
C、unless
D、when

答