单选题
9.
______conscious of my moral obligations as a citizen.
A、
I was and always will be
B、
I have to be and always will be
C、
I had been and always will be
D、
I have been and always will be
【正确答案】
D
【答案解析】
D项表示从过去到现在直至将来的时间段,符合句意要求。故本题选D。
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