问题
选择题
| It's necessary _____ you _____ help each other and learn from each other. |
A. of, to B. for, to C. to, to D. that, to |
答案
答案：B
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| It's necessary _____ you _____ help each other and learn from each other. |
A. of, to B. for, to C. to, to D. that, to |
答案：B