题目内容：
Albert ( ) his homework yesterday, so he couldn..t come to the party.(本题1.0分)A、 must do
B、 may have done
C、 ought to do
D、 had to do
参考答案：
选择题：Albert ( ) his homework yesterday, so he couldn..t
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- 题目类型：选择题
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A、 must do
B、 may have done
C、 ought to do
D、 had to do