【題目】We ____ each other since childhood.

A.have knownB.knewC.knowD.are knowing

【答案】A

【解析】

考查現(xiàn)在完成時(shí)。句意：從兒童時(shí)期我們就是彼此認(rèn)識(shí)。根據(jù)題干中的時(shí)間狀語since childhood可知此處應(yīng)用現(xiàn)在完成時(shí)。故選A。

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