题文
Walking alone in the dark, the boy whistled to __________ his courage.
| A．hold up |
| B．keep up |
| C．set up |
| D．take up |
推荐试卷
Walking alone in the dark, the boy whistled to __________ his courage.
| A．hold up |
| B．keep up |
| C．set up |
| D．take up |
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