题文
The boy the first prize, but he was so careless as to make a foolish mistake.
| A．must have gained | B．need have gained |
| C．could have gained | D．shall have gained |
推荐试卷
The boy the first prize, but he was so careless as to make a foolish mistake.
| A．must have gained | B．need have gained |
| C．could have gained | D．shall have gained |
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