单选题
I won't be able to play outside with you tomorrow because I ______ my homework at that time.
A、
shall have done
B、
will do
C、
will be doing
D、
shall be done
【正确答案】
C
【答案解析】
at that time在句中指的是将来(某时)正发生着的事情，因而要用将来正在进行时。答案为C。
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