高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
Professor Black usually had us ＿＿＿＿ our composition before the class was over.
A.handed in
B.handing in
C.hand in
D.to be handed in
Professor Black usually had us ＿＿＿＿ our composition before the class was over.
A.handed in
B.handing in
C.hand in
D.to be handed in
参考答案：
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