Climbing Mount Tai great skills and not without risk.A．requi
题型：不详难度：来源：
Climbing Mount Tai great skills and not without risk.| A．requires; is | B．required; was | C．required; are | D．required; were |
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答案
| A |
解析
| 本题考查时态。and连接两个并列的谓语动词，陈述的是客观事实，用一般现在时；主语都是Climbing Mount Tai。Doing 形式作主语谓语动词用单数。 |
举一反三
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