Weweresadtoknowthatabout30kidshadbeenkilledinSandyHook...

問題詳情：

 We were sad to know that about 30 kids had been killed in Sandy Hook, Newtown, the USA ____ December 14, 2012.

   A. in           B. at           C. on        D. by

【回答】

C

知識點：介詞和介詞短語

題型：選擇題