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

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

出自：黄山学院大学英语下

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