من المحاضرة الخامسة
2. Using Expression Page 33
1. Mark took part (in) several expeditions to the summits of mountain in the Himalayan region
2. A scientist who tries to figure (out) a way (to) cure cancer is also a kind of explorer.
3. Many of the early female explorers didn't worry (about) hunger or fatigue.
4. Chris laughs (at) danger, she has no fear.
5. Jake participated (in) a 500-mile hike in Northern Australia last fall.
6. Arlene Blum has carried (out) many mountaineering expeditions.