问题
选择题
| So far, several cases of a disease, _____ as bird flu, are reported to have been found in the country. |
A. knowing B. to be known C. having known D. known |
答案
答案：D
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| So far, several cases of a disease, _____ as bird flu, are reported to have been found in the country. |
A. knowing B. to be known C. having known D. known |
答案：D
