题目内容

---- Do you know Jack well?
---- Certainly, we _________ friends since ten years ago.
A．wereB．have madeC．have becomeD．have been
D
考查时态,句意:你很了解杰克吗?_当然了,自从十年前我们就成为了好朋友.结合语境可知下文描述的是从过去一直持续到现在的动作,故用现在完成时态,选项BC表示瞬间动作,故选D.
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