问题
选择题
____ H1N1 flu from spreading, our government has taken some effective measures. [ ]
A. Prevent
B. Preventing
C. Prevented
D. To prevent
答案
| D |
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____ H1N1 flu from spreading, our government has taken some effective measures. [ ]
A. Prevent
B. Preventing
C. Prevented
D. To prevent
| D |