单项选择题

For some time now, world leaders （） out the necessity for agreement on arms reduction.

A．had been pointing
B．have been pointing
C．were pointing
D．pointed

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单项选择题
（）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
单项选择题
James has just arrived, but I didn’t know he（）until yesterday.

A．will come
B．was coming
C．had been coming
D．came
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