Among millions of people who watched television coverage of the rescue of the Chile’s first miner U.S. President Barack Obama, who hailed the operation as an inspiration to the world.
A. is
B. were
C. are
D. was
网友回答
A. is
B. were
C. are
(答案→)D. was
解析：考查主谓一致。本句为完全倒装句，主语为U.S. President Barack Obama，故谓语动词用单数，根据句意用一般过去时，选D。