We must ______ known to all that smoking is harmful to heart.A．thisB．thatC．itD．t
题型：不详难度：来源：
We must ______ known to all that smoking is harmful to heart.| A．this | B．that | C．it | D．the matter |
|
答案
| C |
解析
试题分析：句意：我们必须要让所有人知道吸烟已对心脏有害。it做形式宾语代替后面that引导的宾语从句。故选C。
考点: 考查代词的用法。 |
举一反三
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