题目内容
用适当的介词填空
He has been home only once ________ he went to college.
答案:since
解析:
解析:
since表示动作的起始点,其意是“自从……以来”,常与完成时态连用。 |
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题目内容
用适当的介词填空
He has been home only once ________ he went to college.
since表示动作的起始点,其意是“自从……以来”,常与完成时态连用。 |