问题
选择题
--- Boys and girls, your homework must ______tomorrow morning. Remember?
--- Yes, Miss Green.
A. finish B. be handed in C. will do
答案
答案：B
题目分析：finish完成，结束；be handed in提交；will do将要做。句意：孩子们，你们的作业明天早晨必须交上来，记住了吗？——是的，格林老师。结合语境可知本句主语是动作对象，故用被动语态，选B。