高等继续教育 / 大学英语I
正确率:100%
题型描述: 单选题
The students are kept ______ cleaning the classroom.
A.busy in
B.to busy in
C.busy with
D.busying with
The students are kept ______ cleaning the classroom.
A.busy in
B.to busy in
C.busy with
D.busying with
参考答案:
佳题速递: