form United States of America are treated as singular nouns.

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周一的事情,所以这里是用的hit的过去时:) -beautifulwind- 给 beautifulwind 发送悄悄话 beautifulwind 的博客首页 (0 bytes) () 11/14/2020 postreply 07:50:54

got it. -忒绿- 给 忒绿 发送悄悄话 忒绿 的博客首页 (0 bytes) () 11/14/2020 postreply 08:16:00

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