题目内容
The new term is coming. The students are busy _______ the classrooms. |
A. clean B. cleans C. to clean D. cleaning |
试题答案
D
相关题目
The new term is coming. The students are busy _______ the classrooms.
[ ]
A. clean
B. cleans
C. to clean
D. cleaning
查看习题详情和答案>>
B. cleans
C. to clean
D. cleaning