题文
—I must apologize for ______ ahead of time.
—That’s all right.
| A．not letting you to know | B．not letting you know |
| C．letting you know not | D．letting not you know |
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—I must apologize for ______ ahead of time.
—That’s all right.
| A．not letting you to know | B．not letting you know |
| C．letting you know not | D．letting not you know |
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