I'll be busy on Sunday morning, and perhaps I'll have late night.A. the; aB. /; aC. /;

I'll be busy on Sunday morning, and perhaps I'll have late night.
A. the; a
B. /; a
C. /; the
D. the; /

A. the; a(答案→)B. /; aC. /; theD. the; /解析：B 考察冠词。由语境可知，周日早上我很忙，也许晚上还要晚睡。On Sunday morning意为“在周日的早晨”；have a late night晚睡，符合上下文语境。故B正确。

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