Climbing Mount Tai great skills and not without risk.A.requires; isB.required; w
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Climbing Mount Tai great skills and not without risk.
A.requires; is
B.required; was
C.required; are
D.required; were
试题答案
A
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。