Question

A person , when_________，can often do what is normally beyond his ability. A．challenged B．c

A person , when_________，can often do what is normally beyond his ability. A．challenged B．challenges C．challenging D．to challenge

Answer 1

A

试题分析：考查非谓语动词的区别。句意：当一个人受到挑战时，经常做那些超出他能力范围的是事。When，while等连词引导从句时，如果从句的主语与主句的主语一致，且从句谓语动词是be时就可以省略从句的主语和系动词be，这里完整的是“when a person is challenged,….”人与挑战之间是被动关系，不是主动，排除C，； B 项谓语动词用，主语不能省略，排除；D 项不定式一般式放在系动词be后表示按计划或安排即将要做的事；故A正确。