问题补充：
-- Will you go to the show next Monday?
-- Yes. Every boy and every girl in the area invited.
A. were
B. have been
C. has been
D. was
答案：
A. were
B. have been
(答案→)C. has been
D. was
解析：考察主谓一致和时态。Every/each/no+单数名词+every/each/no+单数名词 做主语，谓语动词用单数。在根据句子的意思可知应该是美国人都被邀请了。故C正确。
