题文
His sister left home in 1998, and ______ since.
| A．had not been heard of |
| B．has not been heard of |
| C．had not heard of |
| D．has not heard of |
推荐试卷
His sister left home in 1998, and ______ since.
| A．had not been heard of |
| B．has not been heard of |
| C．had not heard of |
| D．has not heard of |
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