He found himself in a very dan

解题思路： 在以 if, when, though, as if （好像）等连词引导的从句中，如从句中的主要动词是 be ，常将主语和动词 be 省略。 If necessary, we shall send a telegram home。 如有必要，我们就往家里打电报。 Whenever possible, he will come to my help。 他一有可能就来帮助我。 While cycling, don ' t forget the traffic lights。 骑车时，不要忘记看红绿灯。 解题过程： He found himself in a very dangerous situation when climbing in Utah。= He found himself in a very dangerous situation when he was climbing in Utah。最终答案：如上