______ their homework, these three stude
题型:选择题
问题:
______ their homework, these three students have to stay in the classroom for another thirty minutes.
A.Not finishing
B.Not finished
C.Having not finished
D.Not having finished
______ their homework, these three students have to stay in the classroom for another thirty minutes.
A.Not finishing
B.Not finished
C.Having not finished
D.Not having finished