问题补充:
is very important for us students to learn English well.
A. It
B. As
C. What
D. There
答案:
(答案→)A. It
B. As
C. What
D. There
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。
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