1.you mustn't ( ) (cross) the road now.2.look!what are they ( ) (do) now.

分类: 作业答案 • 2021-12-20 02:15:32

问题描述：

答

1. cross
2. doing

答

cross
doing

答

cross must是情态动词,所以后面跟动词原形
doing 现在进行时,be doing