问题:
—Please clean up the classroom. It"s really a _____.
—OK. I"ll do it at once.
[ ]
A. mess
B. dirt
C. matter
D. trouble
—Please clean up the classroom. It"s really a _____.
—OK. I"ll do it at once.
B. dirt
C. matter
D. trouble
—OK. I"ll do it at once.
[ ]
A. mess B. dirt
C. matter
D. trouble
参考答案: