—Can you keep a secret?
—You ________ worry—I'm not going to mention it to anyone.
| A．needn't | B．couldn't |
| C．mustn't | D．won't |
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—Can you keep a secret?
—You ________ worry—I'm not going to mention it to anyone.
| A．needn't | B．couldn't |
| C．mustn't | D．won't |
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