_______ is very important for us students to learn English well.A．ItB．AsC．WhatD．
题型：不详难度：来源：
| _______ is very important for us students to learn English well. |
答案
| A |
解析
| 考查it形式主语.本题的it是形式主语，真正的主语是后面的不定式to learn English well。在英语中能做形式主语或者形式宾语的只有it，故A正确。 |
举一反三
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A it B them C her D that |
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