—I'm going to the concert tonight.
—I'm likely to go out too. Bring the keys with you __________ I'm out.
| A．if |
| B．when |
| C．in case |
| D．as |
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—I'm going to the concert tonight.
—I'm likely to go out too. Bring the keys with you __________ I'm out.
| A．if |
| B．when |
| C．in case |
| D．as |
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